CJCP     2016 18 (2):  177-182    ISSN: 1008-8830  CN: 43-1301/R Vitamin A level and diseases of premature infants TAO En-Fu, YUAN Tian-Ming Department of Neonatology, Children's Hospital of Zhejiang University, Hangzhou 310003, China Received: 2015-10-13  Revised: 2015-12-15  Online: null Supporting info null