1. Department of Clinical Microscopy, Faculty of Medical Technology, Mahidol University, Nakhon Pathom 73170, Thailand
2. Hematology and Transfusion Science Research Center and School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
3. Medical Department, Golden Jubilee Medical Center, Faculty of Medicine Siriraj Hospital, Mahidol University, Nakhon Pathom 73170, Thailand
4. Department of Obstetrics and Gynecology, Police General Hospital, Bangkok 10330, Thailand