Qiu, Junke
Wang, Caihong
Pan, Xiaohong
Pan, Lei
Huang, Xiaoqing
Xu, Jiekun
Ji, Xiaobo
Mao, Minjie
Funding for this research was provided by:
Health and Family Planning Commission of Zhejiang Province (2014KYA182)
Health and Family Planning Commission of Hangzhou Municipality (20160533B40)
Health and Family Planning Commission of Hangzhou Municipality (20160533B40)
Article History
Received: 7 November 2018
Accepted: 28 January 2019
First Online: 4 February 2019
Ethics approval and consent to participate
: The Clinical Ethics Committee of Hangzhou Red Cross Hospital approved the study. Informed consent was waived due to the retrospective study design.
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.