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Johnson TA, Neely ST, Kopun JG, Dierking DM, Tan H, Gorga MP.Johnson TA, et al. Among authors: kopun jg.Ear Hear. 2010 Feb;31(1):74-83. doi: 10.1097/AUD.0b013e3181b71924.Ear Hear. 2010.PMID: 19701088Free PMC article.