1. College of Veterinary Medicine, Kyungpook National University, Daegu 702-701, South Korea.
2. Neuronal Circuit Mechanisms Research Group, RIKEN Brain Science Institute, Saitama 351-0198, Japan.
3. Laboratory for Learning and Memory, RIKEN Brain Science Institute, Saitama 351-0198, Japan.
4. Department of Human Genetics and Carl C. Icahn Institute for Gene Therapy and Molecular Medicine, Mount Sinai School of Medicine, New York, NY 10029.
5. Pain and Neural Injury Research Center, MRC, Kyungpook National University, Daegu 702-701, South Korea.