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Sharma A, Schwartz RA.Sharma A, et al. Among authors: schwartz ra.J Am Acad Dermatol. 2012 Dec;67(6):1342-8. doi: 10.1016/j.jaad.2012.04.028. Epub 2012 Jun 8.J Am Acad Dermatol. 2012.PMID: 22682884Review.