1. Division of Cardiovascular Medicine, Department of Medicine, Faculty of Medicine Chulalongkorn University Bhumisiri Mangkhalanusorn Building, M Floor, Zone C, 1873 Rama IV Rd Bangkok Pathumwan 10330 Thailand
2. Cardiac Center King Chulalongkorn Memorial Hospital, Thai Red Cross Society Bangkok Thailand
3. Department of Physiology, Faculty of Medicine Chulalongkorn University Bangkok Thailand
4. Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine Chulalongkorn University Bangkok Thailand
5. Excellent Center in Diabetes, Hormones and Metabolism King Chulalongkorn Memorial Hospital, Thai Red Cross Society Bangkok Thailand