1. Department of Pharmacology, Kyungpook National University, Daegu 700-422, Korea
2. Brain Science and Engineering Institute, Kyungpook National University, Daegu 700-422, Korea
3. Department of Dental Pharmacology, School of Dentistry, Kyungpook National University, Daegu 700-422, Korea
4. Department of Psychiatry, School of Medicine, Kyungpook National University, Daegu 700-422, Korea