1. Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
2. Division of Hematology and Oncology; Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
3. Institute of Public Health; School of Medicine; National Yang-Ming University; Taipei Taiwan
4. Department of Family Medicine; Taipei Veterans General Hospital; Taipei Taiwan
5. School of Medicine; National Yang-Ming University; Taipei Taiwan
6. Division of Infectious Diseases; Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
7. Institute of Emergency and Critical Care Medicine; School of Medicine; National Yang-Ming University; Taipei Taiwan