Survey of red cell parameters in 1600 United States hospitals.
D004906:Erythrocyte Count; D006400:Hematocrit; D006405:Hematology; D006452:Hemoglobinometry; D006761:Hospitals; D006801:Humans; D007753:Laboratories; D007958:Leukocyte Count; D010336:Pathology; D012955:Societies, Medical; D013223:Statistics as Topic; D014481:United States