1. Medical Science Program, Graduate School, Khon Kaen University, Khon Kaen, Thailand
2. Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen university, Khon Kaen, Thailand
3. Hematology Division, Department of Internal Medicine, Srinagarind Hospital, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
4. Diagnostic Microscopy Unit, Srinagarind Hospital, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand