1. Department of Clinical Pathology, Chang Gung University, Taoyuan.
2. Division of Clinical Research, National Health Research Institutes, Taipei, Taiwan.
3. Division of Infectious Diseases, Department of Internal Medicine, Lin-Kou Medical Centre, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan.
4. School of Medical Technology, Chang Gung University, Taoyuan.