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de Graaf M, Knol MJ, Totté JE, van Os-Medendorp H, Breugem CC, Pasmans SG.de Graaf M, et al.J Am Acad Dermatol. 2014 May;70(5):893-8. doi: 10.1016/j.jaad.2013.10.040. Epub 2014 Feb 10.J Am Acad Dermatol. 2014.PMID: 24524882