Effect of caffeine citrate on early pulmonary function in preterm infants with apnea
YU Mei, HUANG Jin-Hua, ZHU Rong, ZHANG Xu-Zhong, WU Wan-Yun, WEN Xiao-Hong
CJCP . 2016, (3): 206 -210 .  DOI: 10.7499/j.issn.1008-8830.2016.03.003