[1] McGill Univ, Dept Obstet & Gynecol, Montreal, PQ, Canada
[2] Tel Aviv Univ, Sackler Fac Med, Tel Aviv Sourasky Med Ctr, Dept Obstet & Gynecol,Lis Matern Hosp, 6 Weizmann St, IL-64239 Tel Aviv, Israel
[3] Tel Aviv Univ, Sackler Fac Med, Tel Aviv Sourasky Med Ctr, Hematol Inst, 6 Weizmann St, IL-64239 Tel Aviv, Israel