1. Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
2. Department of Microbiology, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
3. Biotechnology Division, Korea Atomic Energy Research Institute, Jeongeup, Republic of Korea
4. Department of Radiation Biotechnology and Applied Radioisotope Science, University of Science and Technology, Daejeon, Republic of Korea