Funding for this research was provided by:
National Natural Science Foundation of China (81772240)
Guangdong Science and Technology Department (2017A020212008)
Medical Science and Technology Foundation of Guangdong Province (C2017043, A2016269)
Received: 19 May 2019
Accepted: 3 February 2020
First Online: 22 February 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Dermatology Hospital of Southern Medical University. The objectives, procedures, and potential risks were verbally explained to all participants. Written informed consent was obtained from all participants prior to inclusion in this study (in Chinese).
: Not applicable.
: The authors declare that they have no competing interests.