[1] UNIV CALGARY,FOOTHILLS HOSP,DEPT CLIN NEUROSCI,1403 29TH ST NW,CALGARY T2N 2T9,ALBERTA,CANADA
[2] UNIV CALGARY,CALGARY T2N 1N4,ALBERTA,CANADA
[3] UNIV BRITISH COLUMBIA HOSP,DEPT MED BIOCHEM,VANCOUVER,BC,CANADA
[4] ALBERTA CHILDRENS PROV GEN HOSP,CALGARY,ALBERTA,CANADA
[5] DUKE UNIV,DEPT PEDIAT,DIV GENET & METAB,DURHAM,NC 27706
[6] MAYO CLIN & MAYO FDN,DEPT NEUROL,ROCHESTER,MN 55905
[7] UNIV COLORADO,SCH MED,DEPT PEDIAT,DENVER,CO 80202