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Salim A, Tan E, Ilchyshyn A, Berth-Jones J.Salim A, et al.Br J Dermatol. 2006 Jun;154(6):1169-74. doi: 10.1111/j.1365-2133.2006.07289.x.Br J Dermatol. 2006.PMID: 16704650Clinical Trial.