Knowledge, attitudes and practices of preconception and prenatal care in Tianjin obstetrics and gynecology personnels

WANG Jianmei, ZHANG Yujuan, HUO Yan, YANG Jing, XIE Guohua, YIN Wenjing

Tianjin Medical Journal . 2015, (8): 912 -915 . DOI: 10.11958/j.issn.0253-9896.2015.08.023