1. Department of Medical Genetics; University of Calgary; Calgary; Alberta; Canada
2. Department of Genetics; Children's Hospital of Eastern Ontario; Ottawa; Ontario; Canada
3. Children's Hospital of Eastern Ontario Research Institute; Ottawa; Ontario; Canada
4. Department of Molecular and Human Genetics; Baylor College of Medicine; Houston; Texas
5. Centre of Excellence in Neuromics; Université de Montréal and CHU Sainte-Justine Research Centre; Montréal; Québec; Canada
6. Steering Committee Membership is listed in Acknowledgements