1. Department of Pathology, Maha Chakri Sirindhorn Medical Center, Faculty of Medicine, Srinakharinwirot University, Nakhon Nayok, Thailand
2. Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
3. Department of Medical Technology, School of Allied Health Sciences, University of Phayao, Phayao, Thailand