1. Centre for Integrated Research and Understanding of Sleep (CIRUS), Woolcock Institute of Medical Research University of Sydney Camperdown New South Wales Australia
2. Department of Respiratory Medicine Dubbo Health Service Dubbo New South Wales Australia
3. Department of Respiratory and Sleep Medicine Royal Prince Alfred Hospital Sydney New South Wales Australia
4. Division of Respiratory and Critical Care Medicine, Department of Medicine University of Hong Kong Hong Kong
5. Respiratory Division University of Hong Kong Shenzhen Hospital Shenzhen China