1. National Cardiovascular Center Research Institute (Y.I., N.M., T.K., K.K., H.M.), Fujishirodai, Suita, Osaka 565
2. Faculty of Pharmaceutical Sciences, Setsunan University (Y.I., M.Y.), Hirakata, Osaka 573–01
3. Shionogi Co., Ltd. (T.T.), Mishima, Settsu, Osaka 566, Japan