1. Faculty of Pharmaceutical Sciences, Setsunan University, 45-1, Nagaokatoge-cho, Hirakata, Osaka 573-0101, Japan
2. Research & Development Division, Towa Pharmaceutical Co., Ltd., 32-8, Kuwazai-shinmachi, Kadoma, Osaka 571-0043, Japan
3. Research Center, Kyowa Pharmaceutical Industry Co., Ltd., 6-7-2, Yurinokidai, Sanda, Hyogo 669-1324, Japan
4. Pharmaceutical Development Center, Nichi-Iko Pharmaceutical Co., Ltd., 205-1 Shimo-umezawa, Namerikawa, Toyama 936-0857, Japan
5. Drug Development Laboratory, Ohara Pharmaceutical Co., Ltd., 121-15, Toriino, Koka-cho, Koka, Shiga 520-3403, Japan
6. Research & Development Division, Taiyo Pharmaceutical Industry Co., Ltd., 1-24-11, Taiko, Nakamura-ku, Nagoya, Aichi 453-0801, Japan
7. Biological Research Department, Sawai Pharmaceutical Co., Ltd., 2-30, Miyahara 5-chome, Yodogawa-ku, Osaka 532-0003, Japan