Mean perfused capillary density in sham and cecal ligation and perforation (CLP) mice. The sham and CLP groups consisted of seven and eight mice, respectively. Erythropoietin (EPO) 400 U/kg was administered to the CLP group after baseline measurement (time 0) was obtained.*p < 0.01 versus sham at baseline time 0. #p < 0.01 versus CLP at baseline time 0. Values are presented as mean ± standard error. sc, subcutaneous.