CJCP     2017 19 (6):  638-645    ISSN: 1008-8830  CN: 43-1301/R Early postnatal application of glucocorticoids for preventing bronchopulmonary dysplasia in preterm infants: a Meta analysis JI Feng-Juan, YIN Yong, XU Juan, ZHAO Li-Xia, ZHOU Ya-Juan, ZHU Lei Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China Received: 2016-12-23  Revised: 2017-03-02  Online: null Supporting info