Li, Qinghua
Han, Yangyang
Xu, Peng
Yin, Lingxuan
Si, Yanru
Zhang, Cuijuan
Meng, Yuhan
Feng, Weiguo
Pan, Zhifang
Gao, Zhiqin
Li, Jie
Yang, Weiwei http://orcid.org/0000-0001-6725-2745
Funding for this research was provided by:
Weifang Medical University (2017BSQD11)
Health and Family Planning Commission of Shandong Province (2016WS0668)
National Natural Science Foundation of China (81601318, 81501683, 21806093, 81501275)
Natural Science Foundation of Shandong Province (ZR2015HL021, ZR2019MH047[Fight])
Article History
Received: 2 March 2020
Revised: 17 April 2020
Accepted: 23 April 2020
First Online: 13 May 2020
Conflict of interest
: The authors declare that they have no conflict of interest.