CJCP     2012 14 (06):  401-405    ISSN: 1008-8830  CN: 43-1301/R Clinical application of proportional assist ventilation in very low birth weight infants with ventilator dependence DUAN Jiang, HE Xi-Yu, ZHENG Tian, KONG Xiang-Yong, FENG Zhi-Chun Bayi Children's Hospital, Military General Hospital of Beijing People's Liberation Army, Beijing 100700, China. zhjfengzc@126.com Received: null  Revised: null  Online: null Supporting info