1. Division of Hematology and Oncology Medicine, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
2. School of Public Health, National Defense Medical Center, Taipei, Taiwan, Republic of China
3. Department of Research and Development, National Defense Medical Center, Taipei, Taiwan, Republic of China
4. Division of Infectious Diseases and Tropical Medicine, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China