CJCP     2022 24 (5):  500-506    ISSN: 1008-8830  CN: 43-1301/R Timing of surgical ligation of patent ductus arteriosus in very low birth weight infants LIU Tai-Xiang, MA Xiao-Lu, CHEN Zheng, SHI Li-Ping Department of Neonatal Intensive Care Unit, Children's Hospital, Zhejiang University School of Medicine/National Clinical Research Center for Child Health, Hangzhou 310052, China (Shi L-P, Email: slping2008@163.com) Received: 2022-01-02  Revised: null  Online: null Supporting info