[1] McGill Univ, Dept Neurol & Neurosurg, Montreal, PQ H3A 0G4, Canada
[2] McGill Univ, Dept Pediat, Montreal, PQ H3A 0G4, Canada
[3] McGill Univ, Dept Human Genet, Montreal, PQ H3A 0G4, Canada
[4] McGill Univ, Child Hlth & Human Dev Program, Res Inst, Hlth Ctr, Montreal, PQ H4A 3J1, Canada
[5] McGill Univ, Dept Specialized Med, Div Med Genet, Hlth Ctr, Montreal, PQ H4A 3J1, Canada
[6] Univ Montreal, Dept Pediat, Div Child Neurol, CHU St Justine, Montreal, PQ H3T 1C5, Canada
[7] Vrije Univ Amsterdam, Amsterdam Univ Med Ctr, Emma Childrens Hosp, Dept Child Neurol,Amsterdam Leukodystrophy Ctr, NL-1081 Amsterdam, Netherlands
[8] Vrije Univ Amsterdam, Amsterdam Neurosci, NL-1081 Amsterdam, Netherlands
[9] Diponegoro Univ, Fac Med, Ctr Biomed Res, Semarang 50275, Indonesia
[10] Ctr Hosp Univ Quebec, Dept Pathol, Quebec City, PQ G1R 2J6, Canada
[11] Childrens Hosp Philadelphia, Div Neurol, Philadelphia, PA 19104 USA
[12] Vrije Univ Amsterdam, Dept Clin Genet, Amsterdam UMC, NL-1081 Amsterdam, Netherlands
[13] Johns Hopkins Med Inst, Kennedy Krieger Inst, Dept Neurogenet, Baltimore, MD 21205 USA
[14] Univ Ottawa, Childrens Hosp Eastern Ontario, Div Neurol, Ottawa, ON K1H 8L1, Canada
[15] Univ British Columbia, BC Childrens Hosp, Dept Med Genet, Res Inst, Vancouver, BC V6T 1Z4, Canada
[16] Univ British Columbia, BC Childrens Hosp, Dept Pediat, Div Neurol, Vancouver, BC V6T 1Z4, Canada
[17] Univ Bordeaux, Bordeaux Univ Hosp, Ctr Reference Neurogenet, Serv Genet Med, F-33076 Bordeaux, France
[18] Univ Bordeaux, INSERM U1211, Lab MRGM, F-33076 Bordeaux, France
[19] Hosp Univ Nuestra Senora de Candelaria, Dept Neurol, Santa Cruz De Tenerife 38010, Canary Islands, Spain
[20] Univ Belgrade, Dept Neurol, Clin Child Neurol & Psychiat, Med Fac, Belgrade 11000, Serbia
[21] Univ Calif Los Angeles, David Geffen Sch Med, Dept Neurol, Los Angeles, CA 90095 USA
[22] Montreal Neurol Inst, Montreal, PQ H3A 2B4, Canada
[23] CHU Quebec, Ctr Mere Enfant, Quebec City, PQ G1V 4G2, Canada
[24] Univ Sherbrooke, Dept Pediat, Sherbrooke, PQ J1K 2R1, Canada
[25] Ctr Univ Estacio Ribeirao Preto, Fac Med, BR-14096160 Ribeirao Preto, SP, Brazil
[26] Univ Utah, Dept Pediat, Sch Med, Salt Lake City, UT 84132 USA
[27] Erasmus Univ Hosp, Dept Paediat Neurol, Sophia Childrens Hosp, NL-3015 CN Rotterdam, Netherlands
[28] Ctr Hosp Porto, Neuroradiol Dept, P-4099001 Porto, Portugal
[29] Royal Belfast Hosp Sick Children, Dept Paediat Neurol, Belfast BT12 6BA, Antrim, North Ireland
[30] Oslo Univ Hosp, Div Pediat & Adolescent Med, N-0450 Oslo, Norway
[31] Univ Oslo, N-0315 Oslo, Norway
[32] Emory Sch Med, Dept Pediat, Atlanta, GA 30322 USA
[33] Childrens Mem Hlth Inst, Dept Med Genet, PL-04730 Warsaw, Poland
[34] Med Univ Warsaw, Dept Pediat, PL-02091 Warsaw, Poland
[35] Univ Childrens Hosp Tubingen, Dept Child Neurol, D-72076 Tubingen, Germany
[36] Inst Mother & Child Hlth, Dept Child & Adolescent Neurol, PL-01211 Warsaw, Poland
[37] Ctr Dev Neurol SPZ Frankfurt Mitte, D-60316 Frankfurt, Germany
[38] Royal Devon & Exeter NHS Fdn Trust, Peninsula Clin Genet Serv, Exeter EX2 5DW, Devon, England
[39] Ege Univ, Sch Med, Dept Pediat, Div Genet, TR-35040 Izmir, Turkey
[40] Childrens Hosp Philadelphia, Dept Pediat, Div Neurol, Philadelphia, PA 19104 USA
[41] UC Davis Hlth Syst, Div Pediat Neurol, Dept Neurol, Sacramento, CA 95817 USA
[42] Ludwig Maximilians Univ Munchen, Dr V Hauner Childrens Hosp, Dept Pediat Neurol & Dev Med, Univ Hosp, D-80337 Munich, Germany
[43] Univ Med Ctr Hamburg Eppendorf, Univ Childrens Hosp, D-20251 Hamburg, Germany
[44] Univ Childrens Hosp Zurich, Dept Child Neurol, CH-8032 Zurich, Switzerland
[45] Womens & Childrens Hosp, Metab Clin, Adelaide, SA 5006, Australia
[46] Thomayers Hosp, Dept Child Neurol, Prague 14059, Czech Republic
[47] Povisa Hosp, Dept Neurol, Vigo 36211, Spain
[48] Kings Coll Hosp London, Dept Neurol, London SE5 9RS, England
[49] Univ Calgary, Dept Med, Div Endocrinol & Metab, Calgary, AB T2n 1n4, Canada
[50] Natl & Kapodistrian Univ Athens, Attikon Hosp, Dept Pediat 3, Athens 15772, Greece