1. Division of Nutrition and Biochemical Medicine; Department of Medicine; Faculty of Medicine; Ramathibodi Hospital; Mahidol University; Bangkok 10400 Thailand
2. Division of Hematology; Department of Medicine; Faculty of Medicine; Ramathibodi Hospital; Mahidol University; Bangkok 10400 Thailand
3. Division of Dermatology; Department of Medicine; Faculty of Medicine; Ramathibodi Hospital; Mahidol University; Bangkok 10400 Thailand
4. Department of Medicine; Faculty of Medicine; Chakri Naruebodindra Medical Institute; Ramathibodi Hospital; Mahidol University; Bangkok 10400 Thailand