1. Neuroscience Research Institute and Department of Physiology, Korea University College of Medicine, Seoul 02841, Korea.
2. Department of Brain and Cognitive Sciences, College of Natural Sciences, Seoul National University, Seoul 03080, Korea.
3. Dental Research Institute and Department of Neurobiology & Physiology, School of Dentistry, Seoul National University, Seoul 08826, Korea.
4. Department of Physiology, College of Medicine, Gachon University, Incheon 21936, Korea.
5. Department of Neuroscience and Oral Physiology, Osaka University Graduate School of Dentistry, Osaka 565-0871, Japan.