For excess red blood cells, DDx dictates the therapy.
D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D004906:Erythrocyte Count; D004921:Erythropoietin / Q000096:biosynthesis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D011086:Polycythemia / Q000097:blood / Q000175:diagnosis* / Q000628:therapy; D011087:Polycythemia Vera / Q000175:diagnosis; D013163:Splenomegaly / Q000175:diagnosis
D004921:Erythropoietin; D010100:Oxygen