1. Department of Physiology, College of Medicine, Kyung Hee University, Seoul, Korea.
2. Department of Biochemistry, College of Medicine, Kyung Hee University, Seoul, Korea.
3. Department of Physical Education, College of Social Science, Tong Myong University, Busan, Korea.
4. Department of Ophthalmology, College of Medicine, Chungju Hospital, Konkuk University, Chungju, Korea.
5. Department of Urology, Gachon University Gil Hospital, Incheon, Korea.