1. The Health Observatory, Discipline of Medicine, University of Adelaide, The Queen Elizabeth Hospital Campus, Woodville, South Australia, Australia
2. Adelaide Institute of Sleep Health, Repatriation General Hospital, Daw Park, South Australia, Australia
3. NHMRC Centre for Integrated Research and Understanding of Sleep (CIRUS), Woolcock Institute of Medical Research, Central Clinical School, University of Sydney, New South Wales, Australia
4. Department of Medicine, Flinders University, Bedford Park, Adelaide, South Australia, Australia
5. Freemason's Centre for Men's Health, Discipline of Medicine, University of Adelaide, Adelaide, South Australia, Australia
6. Population Research & Outcomes Studies, Discipline of Medicine, University of Adelaide, Adelaide, South Australia, Australia