Funding for this research was provided by:
National Natural Science Foundation of China (81560327)
Received: 23 September 2018
Accepted: 27 August 2019
First Online: 11 November 2019
Ethics approval and consent to participate
: This study was approved by Biomedical Ethics Review Committee of Yunnan Province. The written informed consent was obtained. The adults’ consents were provided by themselves, and the juveniles’ consents (15–17 years old) were provided by their guardians.
: Not applicable.
: The authors declare that they have no competing interests.