1. Department of Pharmacoepidemiology, School of Public Health, Kyoto University, Yashidakonoe-cho, Sakyo-ku, Kyoto 605-8501, Japan
2. System Division, Hamamatsu Photonics, Co. Ltd 325-6 Sunayama-cho, Hamamatsu, 430-8587, Japan
3. Jo-yuin RBP Laboratories, 645-12 Minami Koriyama-cho, Yamato Koriyama, Nara, 639-1007, Japan