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Frieden IJ, Howard R.Frieden IJ, et al. Among authors: howard r.J Am Acad Dermatol. 1994 Sep;31(3 Pt 2):S42-6. doi: 10.1016/s0190-9622(08)81266-2.J Am Acad Dermatol. 1994.PMID: 8077507Review.