Zhao, Xianzhi
Zhu, Xiaofei
Fei, Jianfeng
Ren, Haipeng
Cao, Yangsen
Ju, Xiaoping
Yuan, Zhiyong
Zhang, Huojun
Funding for this research was provided by:
China Health Promotion Foundation (THC2015001)
Article History
Received: 17 August 2018
Accepted: 8 October 2018
First Online: 22 October 2018
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.