1. Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada;
2. BC Children's Hospital Research Institute, Vancouver, BC, Canada;
3. Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada;
4. BC Women's Hospital Research Institute, Vancouver, BC, Canada;
5. Department of Occupational Science and Occupational Therapy, University of British Columbia, Vancouver, BC, Canada;
6. Canuck Place Children's Hospice, Vancouver, BC, Canada; and
7. School of Population and Public Health, University of British Columbia, and BC Children's Hospital Research Institute, Vancouver, BC, Canada.