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Archives of Physical Medicine and Rehabilitation|August 1, 1979
Dysphagia associated with cricopharyngeal dysfunctionA R Schultz, P Niemtzow, S R Jacobs, et al.
Dysphagia|January 1, 1993
Effect of head position on the dynamics of the upper esophageal sphincter and pharynxJ A Castell, D O Castell, A R Schultz, et al.
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