1. Psoriasis is a kind of common, chronic and recurrent skin disease.Retinoid has been successfully used in antipsoriatic therapy.
   银屑病为常见的慢性复发性皮肤病，维A酸已成功应用于该疾病的治疗。Psoriasis is a kind of common, chronic and recurrent skin disease.Retinoid has been successfully used in antipsoriatic therapy.
   银屑病为常见的慢性复发性皮肤病，维A酸已成功应用于该疾病的治疗。

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