Li, Lizhuo
Qiao, Xin
Wang, Xia
Liu, Di
Xue, Qingmu
Han, Lu
Dai, Fei
Ma, Guomin
Yang, Zhipeng
Zhang, Tao
Yang, Shuo
Cai, Shikang
Gao, Mingyue
Yang, Jingyun http://orcid.org/0000-0002-3495-3710
Funding for this research was provided by:
National Natural Science Foundation of China (81660329, 81771493)
Key Science and Technology Program of Shaanxi Province, China (2015SF011)
College Student Innovation & Entrepreneurship Project of Liaoning Province (201410164000016)
College Student Innovation & Entrepreneurship Training Program of Hainan Medical University (HYCX2015054)
National Institute on Aging (R01AG036042)
the Illinois Department of Public Health
Article History
Received: 28 January 2019
Accepted: 5 June 2019
First Online: 14 June 2019
Ethics approval and consent to participate
: Ethics approval and consent to participate is not needed because this is a study of published data.
: Not applicable.
: The authors declare that they have no competing interests.