[1] Univ Montreal, Fac Med, Sch Rehabil, Inst Univ Geriatrie Montreal,Res Ctr, 4565 Chemin Queen Mary, Montreal, PQ H3W 1W5, Canada
[2] Univ Sherbrooke, Fac Med, Sch Rehabil, Ctr Hosp Univ Sherbrooke,Res Ctr, 12e Ave N, Sherbrooke, PQ J1H 5N4, Canada
[3] Ctr Hosp Univ Montreal, Dept Obstet & Gynecol, 1000 Rue St Denis, Montreal, PQ H2X 0C1, Canada
[4] Maisonneuve Rosemont Hosp, Dept Obstet & Gynecol, 5415 Blvd Assompt, Montreal, PQ H1T 2M4, Canada
[5] McGill Univ, Sir Mortimer B Davis Jewish Gen Hosp, Dept Obstet & Gynecol, 3755 Chemin Cote St Catherine, Montreal, PQ H3T 1E2, Canada