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