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35. Comparative treatment of psoriasis with UV-light, trioxsalen plus UV-light, and coal tar plus UV-light. Fischer T. Acta Derm Venereol; 1977 Aug; 57(4):345-50. PubMed ID: 70929 [Abstract] [Full Text] [Related]
39. [Comparative study on the carcinogenic effect of common coal tar and of a new synthetic tar]. Hilfrich J, Mohr U. Arch Dermatol Forsch; 1972 Jul; 242(2):176-8. PubMed ID: 5024626 [No Abstract] [Full Text] [Related]