1. Tokyo New Drug Research Laboratories, Pharmaceutical Division, Kowa Co., Ltd., 2-17-43, Noguchicho, Higashimurayama, Tokyo 189-0022, Japan
2. Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan