[1] Univ Toronto, Dept Mol Genet, Toronto, ON M5S 1A8, Canada
[2] Hosp Sick Children, Program Genet & Genom Biol, Toronto, ON M5G 1L7, Canada
[3] Hosp Sick Children, Ctr Appl Gen, Toronto, ON M5G 1L7, Canada
[4] Univ Toronto, Inst Med Sci, Toronto, ON M5S 1A8, Canada
[5] Univ Toronto, Dept Med, Toronto, ON M5S 1A8, Canada
[6] Univ Louisville, Dept Biochem & Mol Biol, Louisville, KY 40292 USA
[7] Univ Louisville, Dept Psychol & Brain Sci, Louisville, KY 40292 USA
[8] Sydney Childrens Hosp, Dept Clin Genet, Randwick, NSW 2031, Australia
[9] Louisiana State Univ, Div Genet, Dept Pediat, Hlth Sci Ctr, New Orleans, LA 70118 USA
[10] Childrens Hosp, New Orleans, LA 70118 USA
[11] Univ Lausanne, Ctr Integrat Gen, CH-1015 Lausanne, Switzerland
[12] Childrens Hosp Philadelphia, Sect Metab Dis, Philadelphia, PA 19104 USA
[13] Childrens Hosp Philadelphia, Dept Pediat, Philadelphia, PA 19104 USA
[14] Dept Med Genet, Helsinki 00101, Finland
[15] Univ Nevada, Dept Pediat, Sch Med, Las Vegas, NV 89102 USA
[16] Nationwide Childrens Hosp, Dept Pediat, Columbus, OH 43205 USA
[17] Hosp Reggio Calabria Az Ospedaliera Bianchi Melac, Operat Unit Med Genet, I-89100 Reggio Di Calabria, Italy
[18] Kyoto Prefectural Univ Med, Dept Pediat, Kyoto 6028566, Japan
[19] Ibaraki Prefectural Handicapped Childrens Ctr, Dept Pediat, Ibaraki 3100845, Japan
[20] Akdeniz Univ, Dept Med Biol & Genet, Sch Med, TR-07070 Antalya, Turkey
[21] Ctr Biol & Pathol, Serv Cytogenet Constitutionnelle, F-69677 Bron, France
[22] Univ Pavia, I-27100 Pavia, Italy
[23] IRCCS Policlin, I-27100 Pavia, Italy
[24] Univ Manchester, St Marys Hosp, Acad Unit Med Genet, Manchester M13 0JH, Lancs, England