1. Samsung Medical Center, Department of Otorhinolaryngology‐Head and Neck Surgery Sungkyunkwan University School of Medicine Seoul Korea
2. Samsung Medical Center, Department of Psychiatry Sungkyunkwan University School of Medicine Seoul Korea
3. Samsung Changwon hospital, Department of Otorhinolaryngology‐Head and Neck Surgery Sungkyunkwan University School of Medicine Chang‐won Korea