Funding for this research was provided by:
Natural Science Foundation of Guangxi Province (2018GXNSFBA138036, 2010GXNSFAA013161)
Received: 13 August 2021
Accepted: 24 September 2021
First Online: 12 October 2021
: The study was approved by the institutional review boards of the authors’ affiliated institutions, and informed consent was obtained from all subjects.
: Informed consent for publication of photographs was obtained from all subjects.
: The authors declare that they have no competing interests.