1. Department of Qi Medicine, Institute of Biotechnology, Wonkwang University, Iksan 570-749, Korea
2. Department of Physics, Korea Advanced Institute of Science and Technology, Taejon 305-702, Korea
3. Department of Psychology, Chungnam National University, Taejon 305-764, Korea
4. Department of Microbiology & Immunology, School of Medicine, Wonkwang University, Ikran 570-749, Korea