CJCP     2014 16 (6):  596-600    ISSN: 1008-8830  CN: 43-1301/R Analysis of survival and prognostic factors in extremely preterm infants CUI Yin-Zhu, ZHANG Qian-Shen, HE Hong-Yun, CHEN Chun Neonatal Intensive Care Unit, Shenzhen Maternity & Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong 518028, China Received: 2014-01-18  Revised: 2014-03-14  Online: null Supporting info null