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Väätäinen N, Hollmen A, Fräki JE.Väätäinen N, et al. Among authors: fraki je.J Am Acad Dermatol. 1985 Jan;12(1 Pt 1):52-5. doi: 10.1016/s0190-9622(85)70008-4.J Am Acad Dermatol. 1985.PMID: 3980803Clinical Trial.