1. Department of Dermatology and Venereology Sun Yat‐sen Memorial Hospital of Sun Yat‐sen University Guangzhou China
2. Department of Dermatology and Venereology The Second Affiliated Hospital of Guangzhou Medical University Guangzhou China
3. Dermatology Hospital Southern Medical University Guangzhou China
4. School of Statistics and Mathematics Guangdong University of Finance and Economics Guangzhou China