Nosocomial anemia.
D000740:Anemia / Q000209:etiology*; D001815:Bloodletting / Q000009:adverse effects*; D019411:Clinical Laboratory Techniques; D004906:Erythrocyte Count; D005260:Female; D006400:Hematocrit; D006760:Hospitalization; D006801:Humans; D008297:Male; D012156:Reticulocytes; D013997:Time Factors