1. Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 151-742, Republic of Korea
2. Department of Maxillofacial Tissue Regeneration, School of Dentistry, Kyung Hee University, Seoul 130-701, Republic of Korea
3. Laboratory of Molecular Signal Transduction, Center for Neural Science, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea
4. Acupuncture, Moxibustion & Meridian Research Group, Medical Research Division, Korea Institute of Oriental Medicine, Daejeon, Republic of Korea
5. Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, St Paul, MN 55108, USA
6. Pain Cognitive Function Research Center, Dental Research Institute and Department of Neurobiology and Physiology, Department of Brain and cognitive Sciences, Seoul National University, Seoul 110-749, South Korea