CJCP     2015 17 (10):  1032-1038    ISSN: 1008-8830  CN: 43-1301/R Evaluation of therapeutic effects and safety of different treatment methods for premature patent ductus arteriosus CHEN Dan, MAO Jian Department of Neonatology, Shengjing Hospital, China Medical University, Shenyang 110004, China Received: 2015-06-04  Revised: 2015-08-06  Online: null Supporting info null