Fig. 7. Degrees of lung injury were assessed by formation of hyaline membrane and hemorrhage in the lung parenchyma of rabbits after transplantation with placebo (control,  A ) or autologous endothelial progenitor cells (EPCs,  B ). Areas of hyaline membrane and hemorrhage were measured using TwinCAD software (TCAM Development, Taipei, Taiwan). Data were analyzed by unpaired  t test and are presented as mean ± SEM. *  P < 0.05. n = 4 animals in each group.