Funding for this research was provided by:
National Social Science Foundation of China (13BRK010)
Received: 6 January 2019
Accepted: 8 July 2019
First Online: 1 August 2019
Ethics approval and consent to participate
: Ethical review and approval were provided by the ethics committee of Xiangya Nursing School of Central South University, China. Informed consent was obtained from all of the individual participants who were included in the study. A cover letter and the questionnaire in Chinese were distributed to explain the aims and processes of the study. Individuals were allowed to ask the research team any relevant questions. Participation was voluntary and confidential. The returning of the questionnaire was a voluntary way of participating in the study; thus, no consent form was required.
: Not applicable.
: The authors declare that they have no competing interests.