Wu, Shan
Deng, Sheng
Song, Zhi
Xu, Hongbo
Yang, Zhijian
Liu, Xin
Qi, Li
Deng, Hao
Yuan, Lamei http://orcid.org/0000-0001-7558-0669
Funding for this research was provided by:
National Natural Science Foundation of China (81670216, 81800219, 81873686)
Natural Science Foundation of Hunan Province (2015JJ4088, 2016JJ2166, 2017JJ3469)
Scientific Research Project of Health and Family Planning Commission of Hunan Province, China (B20180729, 20180760)
National-level College Students’ Innovative Training Plan Program, China (201810533254)
Article History
Received: 20 August 2018
Accepted: 14 December 2018
First Online: 8 January 2019
Compliance with Ethical Standards
: The study adhered to the tenets of the Declaration of Helsinki. The research protocol was approved by the Institutional Review Board of the Third Xiangya Hospital, Central South University (Changsha, China). All participants and their guardians have signed the written informed consent.
: The authors declare that they have no conflict of interest.