[1] Natl Inst Stroke & Appl Neurosci, Fac Hlth & Environm, Sch Publ Hlth & Psychosocial Studies, Auckland, New Zealand
[2] Auckland City Hosp, Dept Neurol, Auckland, New Zealand
[3] Starship Childrens Hosp, Dept Neurol, Auckland, New Zealand
[4] Dept Pathol & Lab Med, Diagnost Genet LabPLUS, Auckland, New Zealand
[5] Muscular Dystrophy Assoc New Zealand, MDA Natl Off, Auckland, New Zealand
[6] Natl Inst Stroke & Appl Neurosci, Sch Publ Hlth & Psychosocial Studies, Auckland, New Zealand
[7] Univ Otago, Dept Med, Dunedin, New Zealand