Clinical efficacy of plasma exchange in systemic lupus erythematosus during pregnancy oleh Fen Zhang, Bing‐Ying Zhang, Ru Fan, Ting Cheng, Xiao‐Rong Hu, Yu‐Qing Liu, Xing Cen, Yu‐Jie Bu, Jian‐Ping Cao, Feng‐Wu Chen, Jun‐Wei Chen