CJCP     2011 13 (7):  581-585    ISSN: 1008-8830  CN: 43-1301/R Expression of ERK1/2 protein in lung tissues of newborn rats with hyperoxia-induced chronic lung disease HU Yu, LIU Xue-Yan, FU Jian-Hua, XUE Xin-Dong Department of Pediatrics, Shengjing Hospital, China Medical University, Shenyang 110004, China. Email: xdxue@163.com Received: null  Revised: null  Online: null Supporting info