1. Department of Clinical Pathology; Faculty of Medicine, Vajira Hospital, Navamindradhiraj University; Bangkok Thailand
2. Department of Microbiology and Immunology; Faculty of Tropical Medicine; Mahidol University; Bangkok Thailand
3. Department of Medical Technology; Faculty of Science and Technology; Bansomdejchaopraya Rajabhat University; Bangkok Thailand
4. Center for Emerging and Neglected Infectious Diseases; Mahidol University; Salaya Campus Nakorn Pathom Thailand