[1] LEIDEN STATE UNIV,DEPT HUMAN GENET,2312 AV LEIDEN,NETHERLANDS
[2] UNIV HOSP DIJKZIGT,DEPT CLIN GENET,ROTTERDAM,NETHERLANDS
[3] STATE UNIV GRONINGEN,DEPT HUMAN GENET,9700 AB GRONINGEN,NETHERLANDS
[4] UNIV HOSP DIJKZIGT,DEPT GYNAECOL & OBSTET,ROTTERDAM,NETHERLANDS
[5] UNIV STRASBOURG 1,INSERM,U184,MOLEC BIOL LAB,F-67085 STRASBOURG,FRANCE
[6] JOHN RADCLIFFE HOSP,NUFFIELD DEPT CLIN MED,OXFORD OX3 9DU,ENGLAND
[7] HARVARD UNIV,CHILDRENS HOSP,SCH MED,DEPT PEDIAT,DIV GENET,BOSTON,MA 02115
[8] YALE UNIV,SCH MED,DEPT HUMAN GENET,NEW HAVEN,CT 06510
[9] UNIV TORONTO,DEPT MED GENET,TORONTO M5S 1A1,ONTARIO,CANADA