Lim, Kil-Byung, Hong-Jae Lee, Sung-Shick Lim, and Yoo-Im Choi. 2009. “Neuromuscular Electrical and Thermal-Tactile Stimulation for Dysphagia Caused by Stroke: A Randomized Controlled Trial”. Journal of Rehabilitation Medicine 41 (3):174-78. https://doi.org/10.2340/16501977-0317.