Li, Danyang
Huang, Liyan
Yang, Wenfang
Qi, Cuifang
Shang, Li
Xin, Juan
Zeng, Lingxia
Zhang, Min
Song, Hui
Chung, Mei Chun
Funding for this research was provided by:
The Center for Maternal and Child Health, Chinese Center for Disease Control and Prevention (2015FYJ002)
The Program of Xi'an Science and Technology (201805098YX6SF32(1))
Xi'an Health and Family Planning Commission (HX201549)
Key Science and Technology Program of Shaanxi Province ((2019SF-100))
Article History
Received: 5 May 2018
Accepted: 28 August 2019
First Online: 4 September 2019
Ethics approval and consent to participate
: This research was approved by the Ethics Committee of Science of Medical center, First Affiliated Hospital of Xi’an Jiaotong University (No:XJTU1AF2017LSK-45). The written informed consent form was obtained from each participant who took part in this survey.
: Not applicable.
: The authors declare that they have no competing interests.