The surgeon and upper gastro-intestinal bleeding.
D000368:Aged; D005756:Gastritis / Q000150:complications; D006471:Gastrointestinal Hemorrhage / Q000209:etiology / Q000401:mortality / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D010438:Peptic Ulcer Hemorrhage / Q000601:surgery; D013274:Stomach Neoplasms / Q000150:complications