[1] Kunming Med Univ, Affiliated Hosp 2, Dept Dermatol & Venereol, Kunming, Peoples R China
[2] Henan Prov Peoples Hosp, Dept Dermatol, Zhengzhou, Peoples R China
[3] Capital Med Univ, Dept Dermatol & Venereol, Beijing Friendship Hosp, Beijing 100050, Peoples R China