作者单位:251st Hosp Chinese PLA, Dept Dermatol, Zhangjiakou City 075000, Hebei Province, Peoples R China[1]251st Hosp Chinese PLA, Dept Pathol, Zhangjiakou City 075000, Hebei Province, Peoples R China[2]Hebei North Univ, Dept Pathol, Affiliated Hosp 1, Zhangjiakou City, Peoples R China[3]