1. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea.
2. Research Institute of Clinical Medicine of Jeonbuk National University – Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea.
3. Department of Medical Informatics, Jeonbuk National University Medical School, Jeonju, Korea.
4. Department of Otorhinolaryngology-Head and Neck Surgery, Jeonbuk National University Medical School, Jeonju, Korea.