1. Sleep Research Group, Charles Perkins Centre, Sydney Medical School, University of Sydney, Sydney, Australia
2. Centre for Sleep Health and Research, Department of Respiratory and Sleep Medicine, Royal North Shore Hospital, Reserve Rd, St Leonards, NSW, Australia
3. Department of Physiology, Rabigh Medical School, King Abdulaziz University, Jeddah, Saudi Arabia
4. Sleep and Breathing Group, Neuroscience Research Australia (NeuRA), Randwick, Australia
5. School of Medical Sciences, Faculty of Medicine, University of New South Wales, Randwick, Australia