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Wang, Chin-Man; Shieh, Wann-Yun; Ho, Chan-Shien; Hu, Yu-Wei; Wu, Yih-Ru . (2018). Home-Based Orolingual Exercise Improves the Coordination of Swallowing and Respiration in Early Parkinson Disease: A Quasi-Experimental Before-and-After Exercise Program Study. Frontiers in Neurology, 9(), 624–. doi:10.3389/fneur.2018.00624 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research