Abdominoperineal resection morbidity:  preoperative and operative factors.
D000005:Abdomen / Q000601:surgery*; D013505:Digestive System Surgical Procedures; D006801:Humans; D010388:Pelvis; D010502:Perineum / Q000601:surgery*; D012007:Rectum
ABDOMEN/surgery; PERINEUM/surgery