1. Department of Clinical Neurosciences
2. Hotchkiss Brain Institute, and
3. Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
4. Sleep Centre, Foothills Medical Centre, Calgary, Alberta, Canada
5. Department of Medicine, Respiratory and Critical Care Divisions, University of British Columbia, Vancouver, British Columbia, Canada; and
6. Division of Respirology, Critical Care and Sleep Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada