1. Departmentof Pediatrics; Chang Bing Show Chwan Memorial Hospital; Changhua Taiwan
2. Department of Clinical Laboratory; Chang Bing Show Chwan Memorial Hospital; Changhua Taiwan
3. Division of Microbiology; Department of Pathology and Laboratory Medicine; Taipei Veterans General Hospital; Taipei Taiwan
4. Division of Infectious Diseases; Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
5. Institute of Public Health; National Yang-Ming University; Taipei Taiwan