1. Division of Endocrinology and Metabolism; Department of Medicine; Faculty of Medicine Ramathibodi Hospital; Mahidol University; Bangkok Thailand
2. Research Center; Department of Medicine; Faculty of Medicine Ramathibodi Hospital; Mahidol University; Bangkok Thailand
3. Department of Family Medicine; Faculty of Medicine Ramathibodi Hospital; Mahidol University; Bangkok Thailand
4. Section for Clinical Epidemiology and Biostatistics; Faculty of Medicine Ramathibodi Hospital; Mahidol University; Bangkok Thailand