1. School of Electrical and Electronic Engineering; Yonsei University; Seoul 120-749 Korea
2. Program for Nanomedical Science and Technology; Yonsei University; Seoul 120-749 Korea
3. Department of Nanofusion Technology; Pusan National University; Miryang 627-706 Korea
4. Department of Microbiology; Yonsei University College of Medicine; Seoul 120-752 Korea
5. Institute for Immunology and Immunological Diseases and Severance; Biomedical Science Institute; Yonsei University College of Medicine; Seoul 120-752 Korea