1. Department of Rehabilitation Medicine, Daegu Fatima Hospital, Daegu, South Korea
2. Department of Otorhinolaryngology—Head and Neck Surgery, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
3. Department of Otorhinolaryngology—Head and Neck Surgery, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, South Korea