1. Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
2. Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
3. Division of Hematology, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
4. Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
5. Division of Hematology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
6. Division of Hematology, Department of Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
7. Division of Hematology, Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
8. Division of Hematology, Department of Medicine, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
9. Division of Hematology, Department of Medicine, Rajavithi Hospital, Bangkok, Thailand