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Wilke A, Gediga K, Weinhöppel U, John SM, Wulfhorst B.Wilke A, et al. Among authors: john sm.Contact Dermatitis. 2012 Feb;66(2):79-86. doi: 10.1111/j.1600-0536.2011.01976.x. Epub 2011 Oct 5.Contact Dermatitis. 2012.PMID: 21974692Clinical Trial.