1. Division of Endocrinology and Metabolism, Faculty of Medicine Ramathibodi Hospital, Bangkok, Thailand
2. Department of Population and Quantitative Health Sciences, UMass Chan Medical School, Worcester, Massachusetts, USA
3. Department of Family Medicine, Faculty of Medicine Ramathibodi Hospital, Bangkok, Thailand
4. Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine Ramathibodi Hospital, Bangkok, Thailand
5. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
6. Excellence Center for Sleep Disorders, Thai Red Cross Society, King Chulalongkorn Memorial Hospital, Bangkok, Thailand
7. Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA