1. Division of Surgery, Walter Reed Army Institute of Research, Washington, DC, USA
2. Department of Immunology and Biochemistry, US Army Component, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
3. The Thalassemia Center, Division of Hematology, Siriraj Hospital, Bangkok, Thailand
4. Department of Clinical Microscopy, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
5. Department of Surgery, Siriraj Hospital, Mahidol University, Bangkok, Thailand
6. Department of Surgery, Phramongkutklao (Royal Thai Army) Hospital, Bangkok, Thailand
7. Department of Surgery, Police Hospital, Bangkok, Thailand
8. Department of Medicine, Clinical Epidemiology Unit, Siriraj Hospital, Bangkok, Thailand