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APA Citation
Kelly, E. A., Koszewski, I. J., Jaradeh, S. S., Merati, A. L., Blumin, J. H., & Bock, J. M. (2013). botulinum Toxin Injection for the Treatment of Upper Esophageal Sphincter Dysfunction. Annals of otology, rhinology & laryngology, 122, 100–108. http://access.bl.uk/ark:/81055/vdc_100170079926.0x00000f