Funding for this research was provided by:
Foundation for the National Institutes of Health (R25TW009715)
Received: 23 February 2019
Accepted: 2 September 2019
First Online: 9 October 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Guangxi Medical University (No. IRB-SPH-2015: 009). Consent was obtained from all individuals prior to participation.
: Not applicable.
: The authors declare that they have no competing interests.