[1] CHU St Justine, Montreal, PQ H3T 1C5, Canada
[2] Univ Montreal, Fac Med, Montreal, PQ H3T 1C5, Canada
[3] Univ Lyon 1, F-69622 Lyon, France
[4] Hosp Civils Lyon, Serv Cytogenet Constitut, Grp Hosp Est, Ctr Biol & Pathol Est, F-69677 Bron, France
[5] Univ Montreal, Fac Med Dent, Montreal, PQ H3T 1C5, Canada