Gastrointestinal bleeding in distance runners.
D000328:Adult; D000747:Anemia, Hypochromic / Q000209:etiology; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006456:Hemoglobinuria / Q000209:etiology; D006801:Humans; D008297:Male; D012206:Rhabdomyolysis / Q000209:etiology; D012420:Running