1. Department of Molecular Science and Technology, Ajou University, Suwon, 442-721 Korea
2. Laboratory of Molecular Medicine and Neuroscience, Institute for Medical Science, Ajou University School of Medicine, Suwon 442-721, Korea
3. Institute for Neuroregeneration and Stem Cell Research, Ajou University School of Medicine, Suwon 443-721, Korea
4. Department of Pharmacology, Inje University College of Medicine, Pusan 614-735, Korea
5. Department of Microbiology, Changwon National University, Changwon 641-773, Korea
6. Department of Microbiology, College of Natural Science, Pusan National University, Pusan 609-735, Korea