Risk factors for endotracheal intubation during resuscitation in the delivery room among very preterm infants
OU Jiang-Feng, WU Yan, ZHONG Xiao-Yun, CHEN Wen, GONG Hua
CJCP . 2021, (4): 369 -374 .  DOI: 10.7499/j.issn.1008-8830.2102004