Shen, Yong
Gong, Jiaomei
Xu, Qingxia
Zhou, Lili
Sheng, Jiahe
Funding for this research was provided by:
Health Commission of Henan Province (No.2018020495)
Article History
Received: 21 July 2019
Accepted: 23 December 2019
First Online: 6 January 2020
Compliance with ethical standards
: The author(s) declare that they have no competing interests.