1. Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan, Preclinical Assessment Department, Otsuka Pharmaceutical Factory, Inc., Naruto, Tokushima 772-8601, Japan, PhoenixBio, Co., Higashi-Hiroshima, Hiroshima 739-0046, Japan, Graduate School of Biomedical Sciences, Hiroshima University, Minami-ku, Hiroshima 734-8553, Japan, and Towa Environment Science Co., Suminoe-ku, Osaka 559-0034, Japan