Objective: To explore the clinical efficacy of Narrow Band Ultraviolet B(NB-UVB) associate with Polysaccharide Nucleic Acidfraction of Bacillus Calmette Guerin(BCG-PSN) for treatment of vitiligo.

• 目的:观察窄谱中波紫外线(NB-UVB)联合卡介菌多糖核酸治疗白癜风的临床疗效。