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Richter O, Müller-Vogt U, Strutz J, Gassner HG.Richter O, et al. Among authors: gassner hg.HNO. 2013 Apr;61(4):347-9. doi: 10.1007/s00106-012-2539-5.HNO. 2013.PMID: 23241858German.No abstract available.