1. University Health Network, Toronto, Canada.
2. Faculty of Medicine, University of Toronto, Toronto, Canada.
3. Canadian HIV Trials Network, Vancouver, Canada.
4. Department of Lab Sciences, Mc Master University, Hamilton, Canada.
5. Hamilton Health Sciences, Hamilton, Canada.
6. Department of Medicine, McGill University Health Center, Montreal, Canada.
7. Department of Medicine, CHU de Québec-Université Laval, Quebec, Canada.
8. Department of Infectious Diseases, IRCCS Ospedale San Raffaele, Milano, Italy.
9. Department of Infectious Diseases, University of Modena and Reggio Emilia, Modena, Italy.