1. Division of Infectious Diseases and Global Public Health University of California San Diego CA USA
2. National Drug and Alcohol Research Centre University of New South Wales Randwick NSW Australia
3. Population Health Sciences University of Bristol Bristol UK
4. Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM) and Department of Family Medicine and Emergency Medicine, Université de Montréal Montréal Canada