Colorectal.
Nelson
R L
RL
D015179:Colorectal Neoplasms / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D003937:Diagnosis, Differential; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000175:diagnosis / Q000209:etiology / Q000601:surgery; D012002:Rectal Diseases / Q000175:diagnosis / Q000209:etiology / Q000601:surgery; D012307:Risk Factors