1. School of Electronics Engineering, Kyungpook National University, Daegu, Korea.
2. Department of Otorhinolaryngology-Head and Neck Surgery Daegu Veterans Hospital, Daegu, Korea.
3. School of Nano-Bioscience and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, Korea.
4. Department of Otorhinolaryngology, Kyungpook National University College of Medicine, Daegu, Korea.