1. Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, Canada
2. Department of Obstetrics and Gynecology, University of Sherbrooke, Sherbrooke, Quebec, Canada
3. Department of Social and Preventive Medicine, Université de Montreal, Montreal, Quebec, Canada
4. Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
5. Water and Air Quality Bureau, Health Canada, Ottawa, Ontario, Canada
6. Department of Obstetrics, Gynecology and Reproductive Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
7. Department of Obstetrics and Gynecology, McMaster University, Hamilton, Ontario, Canada
8. Department of Obstetrics, Gynecology, University of Ottawa, Ottawa, Ontario, Canada