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Gupta AK, Hofstader SL, Summerbell RC, Solomon R, Adam P, Alexis M, Raboobee N, De Doncker P.Gupta AK, et al. Among authors: summerbell rc.J Am Acad Dermatol. 1998 Aug;39(2 Pt 1):216-9. doi: 10.1016/s0190-9622(98)70078-7.J Am Acad Dermatol. 1998.PMID: 9704832Clinical Trial.