1. Pharmacy Department, University of Montreal Hospital Center, Montreal, Canada.
2. Pharmacy Faculty, University of Montreal, Montreal, Canada.
3. Chronic Viral Illness Service, and McGill University Health Centre, Montreal, Canada.
4. Pharmacy Department, McGill University Health Centre, Montreal, Canada.
5. Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Canada.
6. Chronic Viral Illness Service, University of Montreal Hospital Center, Montreal, Canada.