Liu, Chenggui
Luo, Dan
Wang, Qin
Ma, Yan
Ping, Longyu
Wu, Ting
Tang, Jian
Peng, Duanliang
PingZhao,
Funding for this research was provided by:
Sichuan Provincial Science and Technology Department Research Foundation of China (2013FZ0080)
Chengdu Science and Technology Bureau Research Foundation of China (2015-HM01-00623-SF)
Article History
Received: 24 November 2019
Accepted: 6 March 2020
First Online: 18 March 2020
Ethics approval and consent to participate
: This study was carried out in accordance with the Helsinki Declaration andwas approved by the Medical Ethics Committee at Chengdu Women’s and Children’s Central Hospital, Chengdu, China [(2013)2, Medical Ethics Committee, CWCCH]. The consent from each participant was waived because the present study is a retrospective case-control study. However, the private information in the study has been well protected.
: Not applicable.
: The authors declare that they have no competing interests.