[1] McGill Univ, Ctr Hlth, Dept Human Genet, Montreal, PQ H3G 1A4, Canada
[2] McGill Univ, Ctr Hlth, Dept Obstet & Gynecol, Montreal, PQ H3G 1A4, Canada
[3] Pakistan Inst Med Sci, Dept Obstet & Gynecol, Maternal & Child Hlth Ctr Unit 11, Islamabad, Pakistan
[4] Amer Univ Beirut, Dept Obstet & Gynecol, Beirut, Lebanon
[5] Univ Michigan, Dept Pediat & Commun Dis, Ann Arbor, MI 48109 USA
[6] Postgrad Inst Med Educ & Res, Dept Obstet & Gynecol, Chandigarh 160012, India
[7] Inst Klin Genet, D-55131 Mainz, Germany
[8] Notre Dame Hosp, Ctr Study Brain Dis, Montreal, PQ H2L 4M1, Canada