1 Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, M5G 2C4, Canada. vijay.chattu@mail.utoronto.ca.
2 Division of Occupational Medicine, Occupational Medicine Clinic, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, M5C 2C5, Canada. vijay.chattu@mail.utoronto.ca.
3 International Institute for Global Health, United Nations University, Kuala Lumpur, Malaysia.
4 School of Public Health, The University of Hong Kong, Pok Fu Lam, Hong Kong.
5 School of International Development and Global Studies, Faculty of Social Sciences, University of Ottawa, Ottawa, ON, Canada.
6 The George Institute for Global Health, Imperial College London, London, UK.