1 Department of Neurology Paediatrics, Children's Hospital London Health Science Centre, London, Ontario.
2 Department of Pediatrics, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ontario.
3 Departments of Biochemistry and Paediatrics, Schulich School of Medicine & Dentistry, Western University, London, Ontario.
4 Department of Pediatrics, CHU Sainte-Justine, University of Montreal, Montreal, Quebec.
5 Metabolics and Newborn Screening, Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, Ontario.
6 Department of Pediatrics, University of Ottawa, Ottawa, Ontario.
7 Newborn Screening Ontario, Ottawa, Ontario.
8 Department of Pediatrics and Department of Medical Genetics, McGill University Health Centre, Montreal, Quebec.
9 Division of Pediatric Dermatology & Rheumatology, Children's Hospital of Eastern Ontario, Ottawa.
10 Division of Neuromuscular & Neurometabolic Disorders, Departments of Pediatrics and Medicine, McMaster University, Hamilton Health Sciences Centre, Hamilton, Ontario.
11 Janeway Children's Health and Rehabilitation Centre, St. John's, Newfoundland and Labrador.