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Lee, Kwang Lae, Doo Young Kim, Wan Ho Kim, Eun Joo Kim, Won Seok Lee, Soo Jung Hahn, Min Sung Kang, and So Yeon Ahn. The Influence of Sour Taste On Dysphagia in Brain Injury: Blind Study. Korean Academy of Rehabilitation Medicine, 2012.

Lee, Kwang Lae, et al. The Influence of Sour Taste On Dysphagia in Brain Injury: Blind Study. Korean Academy of Rehabilitation Medicine, 2012.