Maria Prins1, Julie Bruneau2. 1. Department of Infectious Diseases, Research and Prevention, Public Health Service of Amsterdam, Amsterdam 1000CE, Netherlands; Department of Infectious Diseases, Academic Medical Center, Amsterdam, Netherlands. Electronic address: mprins@ggd.amsterdam.nl. 2. Department of Family and Emergency Medicine, Université de Montréal, Montréal, QC, Canada; Research Center of the Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada.