Family Sleep Assessment Unit, Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China

The Sleep Center, Peking University People’s Hospital, Beijing,100044, China

Department of Neurosciences, Clinicum, University of Helsinki, Helsinki, Finland

Department of Public Health Solutions, Finnish Institute for Health and Welfare, Helsinki, Finland

Sleep-Wake Disorders Unit, Department of Neurology, Gui-de-Chauliac Hospital, CHU Montpellier, INM, Univ Montpellier, INSERM, Montpellier, France

Université de Paris, APHP, VIFASOM, Hôtel Dieu, Centre du Sommeil et de la Vigilance, Paris, France

Tokyo Medical University, Tokyo, Japan

Department of Laboratory Medicine, National Center Hospital, National Center of Neurology and Psychiatry, Kodaira, Japan

Department of Psychology, Mississippi State University, Mississippi State, MS, USA

Department of Global Public Health and Primary Care, University of Bergen, Norway and Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital, Bergen, Norway

Department of Production Engineering - Federal University of Rio Grande do Norte, Natal, Brazil

Brain Institute, Physiology and Behavior Department, and Onofre Lopes University Hospital - Federal University of Rio Grande do Norte, Natal, Brazil

 Department of Neuroscience, Sleep Science (BMC), Uppsala University, Sweden

Department of Medical Sciences, Uppsala University, Uppsala, Sweden

Sleep & Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, UK

Department of Anesthesia and Pain Medicine, University Health Network, University of Toronto, Toronto, On, Canada

Centre de recherche CERVO/Brain Research Center, École de psychologie, Université Laval, Quebec City, Canada

Department of Emergency Medicine, Medical University of Gdansk, Gdansk, Poland

Sleep Medicine Center, Charite Universitätsmedizin Berlin, Berlin, Germany

Institute for Dream and Consciousness Research, Medical University of Vienna, Austria

ICOSS - International COVID Sleep Study