1. Division of Hematology and Oncology, Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
2. School of Medicine, National Yang-Ming University; Taipei Taiwan
3. Institute of Public Health, National Yang-Ming University; Taipei Taiwan
4. Division of Oncology and Hematology, Department of Medicine; Far Eastern Memorial Hospital; New Taipei City Taiwan
5. Division of Colon and Rectal Surgery, Department of Surgery; Taipei Veterans General Hospital; Taipei Taiwan
6. Cancer Center; Taipei Veterans General Hospital; Taipei Taiwan
7. Department of Family Medicine; Taipei Veterans General Hospital; Taipei Taiwan
8. Institute of Hospital and Health Care Administration, National Yang-Ming University; Taipei Taiwan