Ni, Wenjie
Yu, Shufei
Zhang, Wencheng
Xiao, Zefen http://orcid.org/0000-0003-0503-6814
Zhou, Zongmei
Chen, Dongfu
Feng, Qinfu
Liang, Jun
Lv, Jima
Gao, Shugeng
Mao, Yousheng
Xue, Qi
Sun, Kelin
Liu, Xiangyang
Fang, Dekang
Li, Jian
Wang, Dali
Funding for this research was provided by:
Capital Fund for Health Improvement and Research (2016-2-4021)
Article History
Received: 6 December 2019
Accepted: 31 January 2020
First Online: 18 February 2020
Ethics approval and consent to participate
: The study protocol has been approved by the ethics committee of the Chinese Academy of Medical Sciences (14–090/880). Written informed consent is obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.