1. Drug Safety Research Laboratories, Pharmaceutical Development Division, Takeda Chemical Industries, Ltd., 2-17-85 Juso Honmachi, Yodogawa-ku, Osaka 532, Japan,
2. Molecular Pharmacology Laboratories, Pharmaceutical Research Division, Takeda Chemical Industries, Ltd., 2-17-85 Juso Honmachi, Yodogawa-ku, Osaka 532, Japan
3. Drug Safety Research Laboratories, Pharmaceutical Development Division, Takeda Chemical Industries, Ltd., 2-17-85 Juso Honmachi, Yodogawa-ku, Osaka 532, Japan
4. Drug Safety Research Laboratories, Pharmaceutical Development Division, Takeda Chemical Industries, Ltd., 4720 Mitsui, Hikari, Yamaguchi 743, Japan