1. Research Center for Hematology and Health Technology, Division of Clinical Microscopy, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand;
2. Department of Medical Technology, Division of Hematology, Sawan Pracharuk Hospital, Nakorn Sawan, Thailand;
3. Department of Clinical Pathology, Laboratory Hematology Unit, Lampang Central Hospital, Amphor Muang, Lampang, Thailand