[1] St Marys Hosp, Dept Clin Epidemiol & Community Studies, Montreal, PQ H3T 1M5, Canada
[2] McGill Univ, Dept Epidemiol & Biostat, Montreal, PQ, Canada
[3] Sante Publ, Montreal, PQ, Canada
[4] Ctr Hosp Ambulatoire Reg Laval, Laval, PQ, Canada
[5] Cite Sante Hop, Laval, PQ, Canada
[6] Ctr Local Serv Communautaires Cotes des Neiges, Montreal, PQ, Canada
[7] McGill Univ, Dept Family Med, Montreal, PQ H3A 2T5, Canada