[1] Jewish Gen Hosp, Lady Davis Inst, Ctr Clin Epidemiol, Montreal, PQ, Canada
[2] Ctr Hosp Univ, Ctr Midi Pyrenees PharmacoVigilance Pharmacoepide, Serv Pharmacol Med & Clin, Fac Med, Toulouse, France
[3] Ctr Hosp Univ, Unite Clin Pharmacol Psychiat, Fac Med, Toulouse, France
[4] McGill Univ, Dept Epidemiol & Biostat, Montreal, PQ, Canada
[5] McGill Univ, Dept Neurol & Neurosurg, Montreal, PQ, Canada