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Walter C, Pabst A, Ziebart T, Klein M, Al-Nawas B.Walter C, et al.Oral Dis. 2011 Mar;17(2):194-9. doi: 10.1111/j.1601-0825.2010.01720.x. Epub 2010 Aug 27.Oral Dis. 2011.PMID: 20796232