1. Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
2. Department of Medicine, University of Calgary, Calgary, Alberta, Canada
3. Sleep Center, Foothills Medical Center, University of Calgary, Alberta, Canada
4. Department of Medical Education, Bangladesh Medical College and Hospital, Dhaka, Bangladesh
5. Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada
6. Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada