1. Centre for Sleep Health and Research, Department of Respiratory Medicine, Royal North Shore Hospital, Sydney Medical School, University of Sydney, Australia
2. Woolcock Institute of Medical Research, University of Sydney, Australia
3. Department of Respiratory Medicine, Toranomon Hospital, Tokyo, Japan
4. Department of Respiratory and Sleep Medicine, St George Hospital, University of New South Wales, Sydney, Australia
5. Department of Statistics, Macquarie University, Sydney, Australia