CJCP     2012 14 (10):  742-745    ISSN: 1008-8830  CN: 43-1301/R Investigation on factors related to pyelic separation in early newborns ZHANG Qian, LI Yan, HE Xiao, XU Shu-Ling, GUO Hong-Xiang, CHENG Xin-Ru Neonatal Intensive Care Unit, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China. jsbwn@yahoo.com.cn Received: null  Revised: null  Online: null Supporting info