1. Pharmaceutics & Biotechnology, College of Medical Engineering; Konyang University; Chungnam 320-711 Republic of Korea
2. College of Pharmacy and Graduate School of Pharmaceutical Sciences; Ewha Womans University; Seoul 120-750 Republic of Korea
3. Department of Physiology; Korea University College of Medicine; Seoul 136-705 Republic of Korea
4. Sensory Research Center, CRI, College of Pharmacy; Seoul National University; Seoul 151-742 Republic of Korea