P-H Wu1, P-W Cheng1, F-C Lin1,2, C-T Wang1,2,3. 1. Department of Otolaryngology Head and Neck Surgery, Far Eastern Memorial Hospital, Taipei, Taiwan. 2. Master's Program of Speech and Language Pathology, Department of Special Education, University of Taipei, Taipei, Taiwan. 3. Department of Otolaryngology Head and Neck Surgery, National Taiwan University College of Medicine, Taipei, Taiwan.