Fig. 3From: Effect of Qinbai Qingfei Concentrated Pellets on substance P and neutral endopeptidase of rats with post-infectious coughEffect of QQCP on oxidative stress in the serum and lung tissue. a SOD and MDA activities in the serum were detected by ELISA. b SOD and MDA activities in the lung tissue were detected by ELISABack to article page