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Ellerston, J. K.; Heller, A. C.; Houtz, D. R.; Kendall, K. A. . (2015). Quantitative Measures of Swallowing Deficits in Patients With Parkinson's Disease. Annals of Otology, Rhinology & Laryngology, (), 0003489415617774–. doi:10.1177/0003489415617774 
10.1177/0003489415617774