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