1. Division of Cancer Epidemiology, McGill University , Montreal, Quebec , Canada
2. Department of Family and Community Medicine and MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St Michael's Hospital, Unity Health Toronto , Toronto, Ontario , Canada
3. Department of Family Medicine, McGill University , Montreal, Quebec , Canada
4. Laboratoire de Virologie Moléculaire, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, et Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal , Montréal, Québec , Canada
5. Infections and Cancer Epidemiology Division, German Cancer Research Center , Heidelberg , Germany