1. Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine, Khon Kaen University, Nai Mueang, Thailand.
2. Department of Medicine, Mount Auburn Hospital, Harvard Medical School, Cambridge, Massachusetts, USA.
3. Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
4. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.
5. Division of Health Systems Management, Department of Community Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Nakhon Pathom, Thailand.