1 Health and Counselling Center, University of Toronto, Mississauga, ON, L5L 1C6, Canada; Department of Family Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada; International Space University, Strasbourg, France. Electronic address: farhan.asrar@utoronto.ca.
2 University of Toronto, Toronto, ON, Canada.
3 Department of Neurology/Center for Space Medicine, Baylor College of Medicine, Houston, TX, USA.
4 Committee on the Peaceful Uses of Outer Space, United Nations, Vienna, Austria; Canadian Space Agency, John H Chapman Space Centre, Saint-Hubert, QC, Canada.
5 Head of Human Research Unit, Directorate of Human Spaceflight and Operations, European Space Agency, Noordwijk, Netherlands.
6 Infectious Diseases Prevention and Control Branch, Public Health Agency of Canada, Saint-Hyacinthe, QC, Canada.
7 European Space Policy Institute, Vienna, Austria.
8 National Aeronautics and Space Administration, Washington, DC, USA.