Funding for this research was provided by:
Chinese National Foundation of Social Sciences (13BZX031)
Open Research Scheme of Yunnan Provincial First Public Hospital (2017ZDKFKT002)
Received: 10 March 2020
Accepted: 12 August 2020
First Online: 17 August 2020
Ethics approval and consent to participate
: The study was conducted following four principles of the Declaration of the 1978 Belmont Report: non-maleficence (do no harm), respect for persons, beneficence (maximize benefits), and justice; in addition, the 2017 UNICEF Innocenti Brief ‘Inclusion with Protection when Conducting Research with Adolescents’ was served as an important ethical guidelines for implementation of field work. Ethics approvals and permissions were obtained from the ethical committee of the Kunming Public Health Bureau (protocol number: 2012/001) and all participants gave written informed consent.
: Not applicable.
: The authors have no financial or personal relationships that might bias this work and no conflicts of interest in the manuscript.