CJCP     2010 12 (11):  864-866    ISSN: 1008-8830  CN: 43-1301/R Relationship between serum estradiol levels in the early postnatal period and the occurrence of hyaline membrane disease and bronchopulmonary dysplasia in neonates ZHANG Li-Juan, WANG Bin, LIU Guo-Sheng Department of Pediatrics, Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China. Email: wangbin6556@126.com Received: null  Revised: null  Online: null Supporting info