1. Department of Neurology, Dong-A University College of Medicine, Busan, Korea.
2. Department of Psychiatry, Dong-A University College of Medicine, Busan, Korea.
3. Department of Nuclear Medicine, Dong-A University College of Medicine, Busan, Korea.
4. Department of Laboratory Animal Medicine, College of Veterinary Medicine, Kyungpook National University, Daegu, Korea.
5. Department of Physiology, School of Medicine, Kyungpook National University, Daegu, Korea.