[1] Xi An Jiao Tong Univ, Northwest Hosp, Dept Dermatol, Affiliated Hosp 2, 157 Xi Wu Rd, Xian 710004, Shaanxi, Peoples R China
[2] Inner Mongolia Univ Sci & Technol, Affiliated Hosp 2, Dept Dermatol, Baotou Med Coll, Baotou, Peoples R China
[3] Inner Mongolia Univ Sci & Technol, Affiliated Hosp 1, Res Ctr Clin Epidemiol, Baotou Med Coll, Baotou, Peoples R China
[4] Bayannur Hosp, Dept Dermatol, Bayannur, Peoples R China
[5] Inner Mongolia Univ Sci & Technol, Affiliated Hosp 1, Dept Dermatol, Baotou Med Coll, 41 Linyin Rd, Baotou 014010, Inner Mongolia, Peoples R China
[6] Inner Mongolia Univ Sci & Technol, Baotou Med Coll, Sch Publ Hlth, Baotou, Peoples R China