Chen, Na
Li, Xin
Yuan, Ni
Zhou, Cheng-chao
Wang, Chang-qing
Funding for this research was provided by:
National Social Science Foundation of China (15CRK015)
National Nature Science Foundation of China (71573139)
Article History
Received: 22 March 2019
Accepted: 13 June 2019
First Online: 24 June 2019
Ethics approval and consent to participate
: The Ethical Committee of Nanjing University of Chinese Medicine approved the study protocol. Participants were informed about the aim of the survey, the selection criterion of the sample, and the assurance that the information was only used for research. Furthermore, the proxy consent procedure was given for those participants who were considered cognitively impaired. All participants gave written informed consent before inclusion in the study.
: Not applicable.
: The authors declare that they have no competing interests.