Is the proprioceptive neuromuscular facilitation technique superior to Shaker exercises in swallowing rehabilitation? - Sayaca C; Serel-Arslan S; Sayaca N; Demir N; Somay G; Kaya D; Karaduman A (European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery, 2020)