The discriminatory value of the blood nitrogen:creatinine ratio in localizing gastrointestinal bleeding.
O'Brien
J J
JJ
D001806:Blood Urea Nitrogen; D003404:Creatinine / Q000097:blood*; D006471:Gastrointestinal Hemorrhage / Q000097:blood / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D012680:Sensitivity and Specificity
D003404:Creatinine