1. Healthy
Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, Canada
2. Department
of Epidemiology, Brown University, Providence, Rhode Island 02912, United States
3. Harvard University School of Public Health, Boston, Massachusetts, United States
4. The Ottawa Hospital Research Institute, Ottawa, ON, Canada
5. Health
Products and Food Branch, Health Canada, Ottawa, ON, Canada
6. Institut National de Santé Publique du Québec, Québec, QC Canada