1. Department of Pharmacology, Institute for Medical Sciences, Chonbuk National University Medical School, Jeonju 561-180, Korea.
2. Department of Physiology, Medical Research Center, College of Medicine, The Catholic University of Korea, Seoul 137-701, Korea.
3. Department of Pharmaceutical Engineering, Gyeongnam National University of Science and Technology, Jinju 660-758, Korea.
4. Institute of Molecular Medicine and Genetics, Department of Neurology, Medical College of Georgia, Georgia Health Sciences University, Augusta, GA 30912, USA.
5. Department of Physiology, Institute of Bioscience and Biotechnology, Kangwon National University College of Medicine, Chuncheon 200-701, Korea.
6. Department of Physiology, Research Institute for Biomacromolecules, University of Ulsan College of Medicine, Seoul 138-736, Korea.