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Johnston J, Stretton M, Mahadevan M, Douglas RG.Johnston J, et al.Clin Otolaryngol. 2018 Jun;43(3):940-944. doi: 10.1111/coa.13070. Epub 2018 Feb 19.Clin Otolaryngol. 2018.PMID: 29377585No abstract available.
Johnston JJ, Douglas R.Johnston JJ, et al.Postgrad Med J. 2018 Jul;94(1113):398-403. doi: 10.1136/postgradmedj-2018-135602. Epub 2018 Jun 8.Postgrad Med J. 2018.PMID: 29884749Review.