Risk factors for ectopic pregnancy: a multi-center case-control study
Crossref DOI link: https://doi.org/10.1186/s12884-015-0613-1
Published Online: 2015-08-22
Published Print: 2015-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Li, Cheng
Zhao, Wei-Hong
Zhu, Qian
Cao, Shu-Jun
Ping, Hua
Xi, Xiaowei
Qin, Guo-Juan
Yan, Ming-Xing
Zhang, Duo
Qiu, Jun
Zhang, Jian
License valid from 2015-08-22