Department of Dermatovenerology;
West China Hospital;
Sichuan University;
Chengdu;
Sichuan 610041;
P. R. China;
Dermatology Hospital of Jiangxi Province;
Nanchang;
Jiangxi 330118;
P. R. China;
Department of Pathology;
West China Hospital;
Sichuan University;
Chengdu;
Sichuan 610041;
P. R. China;
Now work at Department of Dermatology;
Chongqing Ninth Hospital;
Chongqing 400700. P. R. China.;