1. School of Medicine, Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Republic of Korea
2. Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Chuncheon Sacred Heart Hospital, Hallym University, Chuncheon, Republic of Korea
3. Central Research Institute, SewonCellontech Co., Ltd, Wooyoung Techno Center, Seoul, Republic of Korea