Diagnosing gastrointestinal bleeding with labeled red cells.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004912:Erythrocytes; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000000981:diagnostic imaging*; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging; D012007:Rectum