The value of oxygen index and base excess in predicting the outcome of neonatal acute respiratory distress syndrome Hui Wu; Xiaoyang Hong; Yangming Qu; Zhenqiu Liu; Zhe Zhao; Change Liu; Qiong Ji; Jie Wang; Quan Xueli; Sun Jianwei; Dongliang Cheng; Zhi-Chun Feng; Shi Yuan;