Effect of breastfeeding versus formula milk feeding on preterm infants in the neonatal intensive care unit
LI Yong-Wei, YAN Chao-Ying, YANG Lei, HAN Zong-Lai
CJCP . 2017, (5): 572 -575 .  DOI: 10.7499/j.issn.1008-8830.2017.05.019