Methods of search

We searched Medline and Biosis databases to identify articles published before March 19983 and Medline and Embase between March 1998 and July 2001. We used the key words "lichen" and "treatment or therapy" and we combined each treatment modality with "lichen". Because of the small number of controlled studies, we also reviewed the open studies and case reports using treatments usually recommended in textbooks. When mucous and cutaneous LP were evaluated together, we reviewed separately the results obtained in cutaneous and oral LP.

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