1. Department of Otolaryngology, Gyeongsang National University, Jinju, Korea.
2. Department of Nursing Graduate School, Gyeongsang National University, Jinju, Korea.
3. College of Nursing, Gyeongsang National University, Jinju, Korea.
4. Institute of Health Sciences, Gyeongsang National University, Jinju, Korea.
5. Department of Internal Medicine, Gyeongsang National University, Jinju, Korea.
6. Biomedical Research Institute, Gyeongsang National University, Jinju, Korea.
7. Beckman Laser Institute, University of California, Irvine, California.