1. Department of Internal Medicine, School of Medicine, Pusan National University, Busan, Korea.
2. Biomedical Research Institute, Busan, Korea.
3. Department of Otolaryngology, School of Medicine, Pusan National University, Busan, Korea.
4. Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea.
5. Department of Nuclear Medicine, School of Medicine, Pusan National University, Busan, Korea.
6. Kim Yong Ki Internal Medicine Clinic, Busan, Korea.