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Wang SJ, Wong G, de Heer AM, Xia W, Bourguignon LY.Wang SJ, et al. Among authors: de heer am.Laryngoscope. 2009 Aug;119(8):1518-30. doi: 10.1002/lary.20506.Laryngoscope. 2009.PMID: 19507218Free PMC article.