Lin Jinxiong1, Chen Xin2, Liao Yuehua3, Shen Shuqun1
1 Dermatology Hospital of Southern Medical University/Guangdong Dermatology Hospital, Guangzhou 510091, China;
2 School of Health Management, Southern Medical University, Guangzhou 510515, China;
3 Foshan Center for Disease Control and Prevention, Foshan 528051, China