Network
Divisions
Organisational unit: Division
Amsterdam UMC
Organisational unit: UMC
Divisions
Organisational unit: Division
Amsterdam UMC
Organisational unit: UMC
Internal Medicine (AMC)
Organisational unit: Department
Internal Medicine
Organisational unit: Department
01 Internal and external specialisms
Organisational unit: Division
01 Internal and External Specialisms
Organisational unit: Division
Research Institutes
Organisational unit: Research Institute
Research Institutes
Organisational unit: Research Institute
Amsterdam Neuroscience
Organisational unit: Research Institute
Amsterdam Gastroenterology Endocrinology Metabolism
Organisational unit: Research Institute
09 Laboratory Specialisms
Organisational unit: Division
09 Laboratory specialisms
Organisational unit: Division
Laboratory Medicine (AMC)
Organisational unit: Department
Laboratory Medicine
Organisational unit: Department
Other Departments
Organisational unit: Division
Amsterdam Neuroscience
Organisational unit: Research Institute
Amsterdam Neuroscience - Cellular & Molecular Mechanisms
Organisational unit: Research Programme
Doctoral School
Organisational unit: Department
Other Research
Organisational unit: Research Institute
VU-VUMC
Organisational unit: Support Unit
Amsterdam UMC
Organisational unit: UMC
Divisions
Organisational unit: Division
Amsterdam Cardiovascular Sciences
Organisational unit: Research Institute
Amsterdam Movement Sciences
Organisational unit: Research Institute
Amsterdam Movement Sciences
Organisational unit: Research Institute
Amsterdam Cardiovascular Sciences
Organisational unit: Research Institute
Tytgat Institute for Liver and Intestinal Research (AMC)
Organisational unit: Department
Tytgat Institute for Liver and Intestinal Research
Organisational unit: Department
ACS - Diabetes & metabolism
Organisational unit: Research Programme
Amsterdam Public Health
Organisational unit: Research Institute
Amsterdam Public Health
Organisational unit: Research Institute
ACS - Diabetes & metabolism (AMC)
Organisational unit: Research Programme
Internal Medicine (VUmc)
Organisational unit: Department
01 Internal and External Specialisms
Organisational unit: Division
Research Institutes
Organisational unit: Research Institute
General Internal Medicine (AMC)
Organisational unit: Subdepartment
Amsterdam Neuroscience - Compulsivity, Impulsivity & Attention
Organisational unit: Research Programme
05 Neurology and psychiatry
Organisational unit: Division
Amsterdam Neuroscience - Compulsivity, Impulsivity & Attention (AMC)
Organisational unit: Research Programme
Medical Biology
Organisational unit: Department
Medical Biology (AMC)
Organisational unit: Department
04 Woman - Child
Organisational unit: Division
Amsterdam Neuroscience - Neuroinfection & -inflammation
Organisational unit: Research Programme
APH - Aging & Later Life (AMC)
Organisational unit: Research Programme
Paediatrics
Organisational unit: Department
APH - Aging & Later Life
Organisational unit: Research Programme
04 Woman - Child
Organisational unit: Division
Amsterdam Neuroscience - Neuroinfection & -inflammation (AMC)
Organisational unit: Research Programme
Paediatrics (AMC)
Organisational unit: Department
07 Imaging specialisms and Research & Treatment Centre
Organisational unit: Division
05 Neurology and Psychiatry
Organisational unit: Division
07 Imaging Specialisms and Research and Treatment Centre
Organisational unit: Division
Amsterdam Neuroscience
Organisational unit: Research Institute
05 Neurology and Psychiatry
Organisational unit: Division
Amsterdam institute for Infection and Immunity (AMC)
Organisational unit: Research Institute
Medical Biochemistry
Organisational unit: Department
ACS - Atherosclerosis & ischemic syndromes
Organisational unit: Research Programme
Medical Biochemistry (AMC)
Organisational unit: Department
ACS - Atherosclerosis & ischemic syndromes (AMC)
Organisational unit: Research Programme
Psychiatry
Organisational unit: Department
Amsterdam institute for Infection and Immunity
Organisational unit: Research Institute
Global Health
Organisational unit: Department
Adult Psychiatry (AMC)
Organisational unit: Subdepartment
10 Clinical methods and public health
Organisational unit: Division
Center of Experimental and Molecular Medicine (AMC)
Organisational unit: Department
Radiology and Nuclear Medicine (AMC)
Organisational unit: Department
Infectious diseases (AMC)
Organisational unit: Subdepartment
Center of Experimental and Molecular Medicine
Organisational unit: Department
Amsterdam Neuroscience - Brain Imaging
Organisational unit: Research Programme
Cell Biology and Histology (AMC)
Organisational unit: Department
Medical Psychology
Organisational unit: Department
Cell Biology and Histology
Organisational unit: Department
Radiology and Nuclear Medicine
Organisational unit: Department
Psychiatry (AMC)
Organisational unit: Department
Global Health (AMC)
Organisational unit: Department
Child and Adolescent Psychiatry & Psychosocial Care (AMC)
Organisational unit: Subdepartment
04 Woman - Child
Organisational unit: Division
Medical Psychology (AMC)
Organisational unit: Department
Pediatric surgery (VUmc)
Organisational unit: Department
Neurology
Organisational unit: Department
APH - Global Health
Organisational unit: Research Programme
Amsterdam Gastroenterology Endocrinology Metabolism (VUmc)
Organisational unit: Research Institute
Experimental Vascular Medicine (AMC)
Organisational unit: Department
Medical Microbiology
Organisational unit: Department
Amsterdam Neuroscience - Brain Imaging (AMC)
Organisational unit: Research Programme
Biomedical Engineering and Physics (AMC)
Organisational unit: Department
APH - Global Health (AMC)
Organisational unit: Research Programme
Anatomy and neurosciences (VUmc)
Organisational unit: Department
Experimental Immunology (AMC)
Organisational unit: Department
10 Clinical Methods and Public Health
Organisational unit: Division
APH - Methodology (AMC)
Organisational unit: Research Programme
Amsterdam Reproduction & Development
Organisational unit: Research Institute
Epidemiology and Data Science
Organisational unit: Department
Medical Microbiology and Infection Prevention (AMC)
Organisational unit: Department
APH - Methodology
Organisational unit: Research Programme
Biomedical Engineering and Physics
Organisational unit: Department
Experimental Vascular Medicine
Organisational unit: Department
10 Clinical Methods and Public Health
Organisational unit: Division
Anatomy and neurosciences
Organisational unit: Department
09 Laboratory Specialisms
Organisational unit: Division
Laboratory Medicine (VUmc)
Organisational unit: Department
Experimental Immunology
Organisational unit: Department
AII - Infectious diseases
Organisational unit: Research Programme
Amsterdam Movement Sciences
Organisational unit: Research Institute
ACS - Diabetes & metabolism (VUmc)
Organisational unit: Research Programme
Amsterdam Public Health
Organisational unit: Research Institute
Laboratory Genetic Metabolic Diseases
Organisational unit: Department
Amsterdam Neuroscience - Neurodegeneration
Organisational unit: Research Programme
Pathology (Amsterdam UMC)
Organisational unit: Department
AII - Infectious diseases (AMC)
Organisational unit: Research Programme
APH - Mental Health (AMC)
Organisational unit: Research Programme
Pathology (AMC)
Organisational unit: Department
APH - Personalized Medicine
Organisational unit: Research Programme
Genetic Metabolic Diseases (AMC)
Organisational unit: Subdepartment
AR&D - Amsterdam Reproduction & Development
Organisational unit: Research Institute
ACS - Heart failure & arrhythmias
Organisational unit: Research Programme
Neurology (VUmc)
Organisational unit: Department
Public and Occupational Health
Organisational unit: Department
Amsterdam Neuroscience - Cellular & Molecular Mechanisms (VUmc)
Organisational unit: Research Programme
Amsterdam Cardiovascular Sciences
Organisational unit: Research Institute
Epidemiology and Data Science (AMC)
Organisational unit: Department
APH - Personalized Medicine (AMC)
Organisational unit: Research Programme
AII - Inflammatory diseases (AMC)
Organisational unit: Research Programme
APH - Mental Health
Organisational unit: Research Programme
Amsterdam Neuroscience - Brain Imaging (VUmc)
Organisational unit: Research Programme
Epidemiology and Data Science (VUmc)
Organisational unit: Department
ACS - Heart failure & arrhythmias (AMC)
Organisational unit: Research Programme
AII - Inflammatory diseases
Organisational unit: Research Programme
Amsterdam Neuroscience - Systems & Network Neuroscience
Organisational unit: Research Programme
Psychiatry (VUmc)
Organisational unit: Department
Medical psychology (VUmc)
Organisational unit: Department
Amsterdam Neuroscience - Complex Trait Genetics (AMC)
Organisational unit: Research Programme
Cardiology
Organisational unit: Department
Ophthalmology (AMC)
Organisational unit: Department
Amsterdam Reproduction & Development (VUmc)
Organisational unit: Research Institute
AMS - Ageing & Vitality
Organisational unit: Research Programme
07 Imaging Specialisms and Research and Treatment Centre
Organisational unit: Division
Surgery (VUmc)
Organisational unit: Department
03 Heart Centre
Organisational unit: Division
Cancer Center Amsterdam
Organisational unit: Research Institute
Amsterdam Neuroscience - Compulsivity, Impulsivity & Attention (VUmc)
Organisational unit: Research Programme
Ophthalmology
Organisational unit: Department
02 Surgical specialisms
Organisational unit: Division
AMS - Ageing & Vitality
Organisational unit: Research Programme
Neurology (AMC)
Organisational unit: Department
02 Surgical Specialisms
Organisational unit: Division
AMS - Musculoskeletal Health
Organisational unit: Research Programme
AMS - Musculoskeletal Health
Organisational unit: Research Programme
Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep
Organisational unit: Research Programme
CCA - Imaging and biomarkers (VUmc)
Organisational unit: Research Programme
Extramural researchers
Organisational unit: Department
Radiology and Nuclear Medicine (VUmc)
Organisational unit: Department
Amsterdam Neuroscience - Systems & Network Neuroscience (AMC)
Organisational unit: Research Programme
Surgery
Organisational unit: Department
AMS - Tissue Function & Regeneration
Organisational unit: Research Programme
Public and Occupational Health (AMC)
Organisational unit: Department
Amsterdam Neuroscience - Neurodegeneration (VUmc)
Organisational unit: Research Programme
Amsterdam institute for Infection and Immunity (VUmc)
Organisational unit: Research Institute
CCA - Imaging and biomarkers
Organisational unit: Research Programme
APH - Health Behaviors & Chronic Diseases (AMC)
Organisational unit: Research Programme
Gastroenterology and Hepatology
Organisational unit: Department
Amsterdam Neuroscience - Complex Trait Genetics
Organisational unit: Research Programme
Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep (VUmc)
Organisational unit: Research Programme
Paediatric Endocrinology (AMC)
Organisational unit: Subdepartment
Public and occupational health (VUmc)
Organisational unit: Department
Cancer Center Amsterdam
Organisational unit: Research Institute
AII - Infectious diseases (VUmc)
Organisational unit: Research Programme
Cardiology (AMC)
Organisational unit: Department
APH - Methodology (VUmc)
Organisational unit: Research Programme
APH - Health Behaviors & Chronic Diseases
Organisational unit: Research Programme
Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep (AMC)
Organisational unit: Research Programme
03 Heart Centre
Organisational unit: Division
Gastroenterology and Hepatology (AMC)
Organisational unit: Department
Amsterdam Neuroscience - Neuroinfection & -inflammation (VUmc)
Organisational unit: Research Programme
Netherlands Institute for Neuroscience
External organisation: Government
Université de Strasbourg
External organisation: Unknown
Amsterdam UMC - University of Amsterdam
External organisation: University Medical Center
University of Amsterdam
External organisation: Unknown
University of Amsterdam
External organisation: Unknown
University of Amsterdam
External organisation: Unknown
Amsterdam UMC
External organisation: Academic Institute
Maastricht University
External organisation: Unknown
Universidad Nacional Autónoma de México
External organisation: Unknown
Leiden University Medical Center - LUMC
External organisation: Unknown
University of Groningen
External organisation: Unknown
Inserm
External organisation: Unknown
CNRS
External organisation: Government
Amsterdam University Medical Centers
External organisation: Unknown
Comenius University
External organisation: Unknown
University of Amsterdam
External organisation: Unknown
University Medical Centre Utrecht
External organisation: Unknown
Amsterdam UMC
External organisation: Unknown
Vrije Universiteit Amsterdam
External organisation: Unknown
Radboud University, 6525 XZ Nijmegen, The Netherlands. Electronic address: l.genzel@donders.ru.nl.
External organisation: Unknown
Fundação Oswaldo Cruz
External organisation: Unknown
University of Amsterdam and Vrije Universiteit Amsterdam
External organisation: Unknown
Erasmus Universiteit Rotterdam
External organisation: Unknown
Radboud University Nijmegen
External organisation: Unknown
Netherlands Institute for Neuroscience NIN - KNAW
External organisation: Unknown
Royal Netherlands Academy of Arts and Sciences
External organisation: Academic
Utrecht University
External organisation: Unknown
Nanjing Medical University
External organisation: Unknown
University of Bergen
External organisation: Unknown
IMAPP, Radboud University Nijmegen, Nijmegen, The Netherlands auger_spokespersons@fnal.gov
External organisation: Unknown
University of Basel
External organisation: Unknown
Institute of Genetics and Genomics in Geneva (iGE3)
External organisation: Unknown
Viroclinics Xplore, Schaijk, Netherlands
External organisation: Unknown
Metris BV, 2132 NG Hoofddorp, The Netherlands
External organisation: Unknown
Brain Institute, Federal University of Rio Grande do Norte, Natal, Brazil.
External organisation: Unknown
Slovak Academy of Sciences
External organisation: Unknown
Gießen
External organisation: Unknown
Mayo Clinic
External organisation: Unknown
Pediatric Dentistry Unit, School of Dentistry, Federal University of Santa Maria, Brazil
External organisation: University
Heidelberg University
External organisation: Unknown
Radboud University Medical Center
External organisation: Academic Institute
Viroclinics Xplore, 5374 RE Schaijk, The Netherlands.
External organisation: Unknown
Maastricht University, Faculty of Psychology and Neuroscience, Universiteitssingel 40, 6229 ER Maastricht
External organisation: University
Maastricht University, Faculty of Health, Medicine and Life Sciences, Universiteitssingel 60, 6229 ER Maastricht
External organisation: University
University of Pisa
External organisation: Unknown
Polish Academy of Sciences
External organisation: Unknown
Universidade Federal de Santa Maria
External organisation: Unknown
Endocrine Laboratory, Amsterdam, Netherlands
External organisation: Unknown
Barlaeus Gymnasium
External organisation: Unknown
Leiden University
External organisation: Unknown
University Hospital of Strasbourg, Strasbourg, France
External organisation: Unknown
Yale University
External organisation: Unknown
University of Bonn, LIMES-Institut, Carl-Troll-Str. 31, D-53115 Bonn, Germany
External organisation: University
University of Edinburgh
External organisation: Unknown
Erasmus MC – Sophia Children's Hospital
External organisation: Unknown
Institut national de la santé et de la recherche médicale
External organisation: Government
Radboud Alzheimer Center, Radboud University Medical Center, Nijmegen, The Netherlands.
External organisation: Unknown
Biomedical Primate Research Centre, 2288 GJ Rijswijk, The Netherlands.
External organisation: Unknown
Department of Surgery, Amsterdam, Netherlands
External organisation: Unknown
Understanding Animal Research, London, United Kingdom
External organisation: Unknown
Université Paris Cité
External organisation: Unknown
Cancer Center Amsterdam (CCA), Amsterdam UMC, Amsterdam, The Netherlands
External organisation: Unknown
Wageningen University & Research, Departement Dierwetenschappen, Droevendaalsesteeg 10, 6708 PB Wageningen
External organisation: University
Department of Clinical Genetics, Leiden, Netherlands
External organisation: Unknown
Faculty of Biology and Medicine, Lausanne, Switzerland
External organisation: Unknown
Philipps-University of Marburg and Justus-Liebig-University Gießen
External organisation: Unknown
Université Paris Diderot
External organisation: Unknown
Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków 31-343, Poland.
External organisation: Unknown
Utrecht University/Utrecht University of Applied Sciences
External organisation: Unknown
Leiden University Medical Centre (LUMC), Leiden University, Leiden, The Netherlands.
External organisation: Unknown
University of Otago
External organisation: Unknown
Understanding Animal Research
External organisation: Unknown
Radboud University Medical Center
External organisation: Unknown
National Institutes of Health
External organisation: Government
Merton College, University of Oxford, Oxford, UK.
External organisation: Unknown
PHENOMIN-ICS, Institut Clinique de la souris, CNRS, UMR7104, Illkirch, France
External organisation: Unknown
Bioinformatics Laboratory, Amsterdam, Netherlands
External organisation: Unknown
Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
External organisation: University
Biomedical Primate Research Center, 2288 GJ Rijswijk, The Netherlands.
External organisation: Unknown
Yale University School of Medicine
External organisation: Unknown
Onze Lieve Vrouwe Gasthuis
External organisation: Unknown
Center for Chronobiology
External organisation: Unknown
European Animal Research Association, London, UK.
External organisation: Unknown
Delft University of Technology
External organisation: Unknown
Department of Endocrinology and Metabolism, 1100 DD Amsterdam, Netherlands
External organisation: Unknown
Cornell University, Ithaca, New York 14850, USA
External organisation: Unknown
Swiss Federal Institute of Technology Lausanne
External organisation: Unknown
Radboud University, Faculty of Medical Sciences (UMCN), Geert Grooteplein 26, 6525 GA Nijmegen
External organisation: University
Mayo Clinic Cancer Center, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
External organisation: Unknown
Wageningen University & Research
External organisation: Unknown
Department of Integrative Neurophysiology and Medical Psychology
External organisation: Unknown
Department of Clinical Chemistry, Amsterdam, Netherlands
External organisation: Unknown
School of Psychology
External organisation: Unknown
Amsterdam UMC
External organisation: Unknown
1 Faculty of Veterinary Medicine, Utrecht University , Utrecht, The Netherlands .
External organisation: Unknown
School of Psychology, UNSW Sydney, Sydney, NSW, Australia.
External organisation: Unknown
Instituto Cajal
External organisation: Unknown
Universidade Federal do Rio Grande do Norte
External organisation: Unknown
Radboud Reflects, Radboud University Nijmegen
External organisation: Unknown
Brain Center Rudolf Magnus, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands.
External organisation: Unknown
Mayo Clinic Rochester, MN
External organisation: Unknown
Netherlands Cancer Institute
External organisation: Government
University of Würzburg
External organisation: Unknown
Maastricht UMC+
External organisation: University Medical Center
CSIC - Cajal Institute
External organisation: Government
Institute of Pharmacology of the Polish Academy of Sciences
External organisation: Unknown
Sleep and Circadian Neuroscience Institute, University of Oxford,Oxford,UK.
External organisation: Unknown
Texas A&M University
External organisation: Unknown
b Erasmus Medical Center Rotterdam , Rotterdam , The Netherlands.
External organisation: Unknown
Hypothalamic Integration Mechanisms, Amsterdam, Netherlands
External organisation: Unknown
Vrije Universiteit (VU) Amsterdam and VU Medical Center
External organisation: Unknown
Department of Sleep and Cognition
External organisation: Unknown
Salari Institute of Cognitive and Behavioral Disorders (SICBD)
External organisation: Unknown
Department of Endocrinology and Metabolism, Amsterdam, Netherlands
External organisation: Unknown
VU University
External organisation: Unknown
Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB Wageningen
External organisation: Unknown
Department of Internal Medicine, Amsterdam UMC, Amsterdam, The Netherlands
External organisation: Unknown
Academic Medical Centre, University of Amsterdam
External organisation: Unknown
Universidade Estadual de Campinas
External organisation: Unknown
Netherlands Institute for Neuroscience, Amsterdam, Netherlands
External organisation: Unknown
Salari Institute of Cognitive and Behavioral Disorders (SICBD), Karaj, Alborz, Iran.
External organisation: Unknown
Dipartimento di Fisica "Enrico Fermi", University of Pisa, 56127, Pisa, Italy
External organisation: Unknown
University of Groningen, University Medical Center Groningen
External organisation: Unknown
European Animal Research Association
External organisation: Unknown
University College London
External organisation: Unknown
Neurogenetics Laboratory, Amsterdam, Netherlands
External organisation: Unknown
Department of Physiology, Federal University of Rio Grande do Norte, Natal, Brazil.
External organisation: Unknown
Universität Zürich
External organisation: Unknown
Academic Medical Centre (AMC)
External organisation: Unknown
The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam
External organisation: Unknown
Leuven Brain Institute and Faculty of Psychology and Educational Sciences
External organisation: Unknown
Erasmus MC
External organisation: University Medical Center
University of Oxford
External organisation: Unknown
Institute of Behavioural Neuroscience, University College London, London WC1H 0AP, UK.
External organisation: Unknown
Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland.
External organisation: Unknown
Salari Institute of Cognitive and Behavioral Disorders (SICBD), Karaj, Iran
External organisation: Unknown
Laboratory of Endocrinology, Amsterdam, Netherlands
External organisation: Unknown
University of Marburg
External organisation: Unknown
The Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany.
External organisation: Unknown
Netherlands Institute for Neuroscience (NIN-KNAW), Amsterdam, Netherlands
External organisation: Unknown
Departments of Endocrinology and Metabolism, Amsterdam, Netherlands
External organisation: Unknown
Laboratory of Endocrinology
External organisation: Unknown
Aarhus University
External organisation: Unknown
University of Zurich
External organisation: Unknown
Max Delbrück Center for Molecular Medicine in the Helmholtz Association
External organisation: Government
University of Geneva
External organisation: Unknown
Federal University Rio Grande do Norte
External organisation: Unknown
Technical University of Munich
External organisation: Unknown
Free University
External organisation: Unknown
Dept. Hypothalamic Integration Mechanisms
External organisation: Unknown
Instituto Cajal, Consejo Superior de Investigaciones Científicas, Madrid, Spain.
External organisation: Unknown
Helmholtz Zentrum München - German Research Center for Environmental Health
External organisation: Government
Maastricht University, 6211 LK Maastricht, The Netherlands.
External organisation: Unknown
Wageningen Bioveterinary Research, Houtribweg 39, 8221 RA Lelystad
External organisation: Unknown
Sleep Disorders Center
External organisation: Unknown
University College London Genetics Institute, University College London, London WC1E 6BT, UK.
External organisation: Unknown
University of Utrecht, Utrecht
External organisation: Unknown
Oncode Institute, Utrecht, The Netherlands
External organisation: Unknown
Biomedical Primate Research Center
External organisation: Unknown
University of New South Wales
External organisation: Unknown
Cornell University
External organisation: Unknown
University of Bonn
External organisation: Unknown
Understanding Animal Research, London, UK.
External organisation: Unknown
Universite de Geneve Faculte de Medecine
External organisation: Unknown
Federal University of Santa Maria
External organisation: Unknown
German Center for Diabetes Research (DZD), Muenchen-Neuherberg, Germany
External organisation: Unknown
Netherlands Organisation for Applied Scientific Research
External organisation: Government
Wageningen University, 6708 PB Wageningen, The Netherlands.
External organisation: Unknown
Charles River, 5231 DD Den Bosch, The Netherlands
External organisation: Unknown
European Animal Research Association, London, United Kingdom
External organisation: Unknown
Université Grenoble Alpes
External organisation: Unknown
The Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC)
External organisation: Unknown
Department of Endocrinology and Metabolism
External organisation: Unknown
Harvard University
External organisation: Unknown
Oncode Institute, Jaarbeursplein 6, 3521 AL Utrecht, The Netherlands
External organisation: Unknown
University Utrecht, Faculty of Veterinary Medicine, Yalelaan 2, 3584 CM Utrecht
External organisation: University
MC Slotervaart
External organisation: Unknown