1. Public Health Research Unit, Centre Hospitalier Universitaire de Québec-CHUL, Québec City, Québec, Canada
2. Department of Social and Preventive Medicine, Laval University, Québec City, Québec, Canada
3. School of Psychology, Laval University, Québec City, Québec, Canada
4. Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, USA
5. Department of Obstetrics and Gynecology, and Psychology, Wayne State University School of Medicine, Detroit, Michigan, USA
6. Norwegian Institute for Air Research, The Polar Environmental Centre, Tromsø, Norway
7. Trium Environmental Solutions, Inc., Cochrane, Alberta, Canada