Current status of exclusive breastfeeding for the second child and factors influencing exclusive breastfeeding in the context of the universal two-child policy
LUO Ye, ZHAO Hua, LIU Rui-Fang, SHI Hong-Juan
CJCP . 2018, (5): 392 -396 .  DOI: 10.7499/j.issn.1008-8830.2018.05.011