1. Reproduction, Mother and Child Health Unit, CHU de Québec–Université Laval Research Center, Quebec, Canada
2. Department of Microbiology, Centre Hospitalier Sainte-Justine, Université de Montréal, Montreal, Canada
3. Department of Obstetrics and Gynecology, Centre Hospitalier Sainte-Justine, Université de Montréal, Montreal, Canada
4. Department of Obstetrics, Gynecology and Reproduction, Faculty of Medicine, Université Laval, Quebec, Canada