Narrow-band ultraviolet B (UVB) has better overall repigmentation rates and safety profile than either topical or oral psoralens and ultraviolet A (PUVA).
比起局部用补骨脂素或口服后再照UVA，窄谱紫外线有较好的恢复色素的效果和安全性。
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The objective was to observe the influence of previously activated psoralens on the proliferation of K562 cells, and to provide laboratory data for its clinical usage.