1. Division of Infectious Diseases, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, Department of Internal Medicine, National Yung-Ming University, Taipei, Taiwan, and Graduate Institute of Environmental Education, National Kaohsiung Normal University, Kaohsiung, Taiwan
2. Department of Infectious Disease, E-DA Hospital, I-Shou University, Kaohsiung, Taiwan, and Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
3. Centers for Disease Control, Department of Health Taiwan, Taipei, Taiwan
4. Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
5. Graduate Institute of Environmental Education, National Kaohsiung Normal University, Kaohsiung, Taiwan