Quantitative measurement of gastrointestinal blood loss. II. Determination of 24-hour fecal blood loss by a chemical photospectrometric technique.
D005243:Feces; D006471:Gastrointestinal Hemorrhage; D041981:Gastrointestinal Tract; D006470:Hemorrhage; D006801:Humans
FECES; GASTROINTESTINAL SYSTEM/hemorrhage