2.1. Patient
cancer, Cancer
CANCER, CANCER
Patients in the development and validation cohorts in this study were recruited from the SEER database supported by the National Cancer Institute, which collects information on the clinical characteristics and survival of approximately 1-third of cancer patients in the United States. SEER Stat software (version 8.4.0) (The inclusion criteria flowchart of recruited patients in SEER database. SEER = surveillance, epidemiology, and end results database.