CJCP     2005 7 (3):  243-244    ISSN: 1008-8830  CN: 43-1301/R Levels of serum epidermal growth factor in premature infants MAO Zhi-Qin, LI Jun, SUN Mei, HU Guo-Bin, ZHANG Hui Department of Pediatrics, Second Affiliated Hospital of China Medical University, Shenyang 110004, China Received: null  Revised: null  Online: null Supporting info