1. Center for Tropical Medicine and Infectious Disease Research, Kaohsiung Medical University, Kaohsiung, Taiwan
2. Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
3. Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
4. Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
5. Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
6. Program in Tropical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan