1. Dermatology department, Dermatology Hospital, Southern Medical University, Guangzhou, China
2. Department of Dermatology, Sun Yat-Sun Memorial Hospital, Sun Yat-Sun University, Guangzhou, China
3. Department of Biological Sciences, Youngstown State University, One University Plaza, Youngstown, OH, USA
4. Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China