1. Department of Pharmacy, Yodogawa Christian Hospital, Osaka, Japan
2. Departments of Pharmacy, Komaki City Hospital, Komaki City, Aichi, Japan
3. Department of Pharmacy, Nagoya University Hospital, Nagoya, Aichi, Japan
4. Laboratory of Regulatory Sciences, Yokohama University of Pharmacy, Yokohama, Kanagawa, Japan
5. Department of Pharmacy, International University of Health and Welfare Hospital, Nasushiobara City, Tochigi, Japan
6. Nippon Medical School Tama-Nagayama Hospital, Tama, Tokyo, Japan
7. Department of Pain Control Research, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
8. Supportive and Palliative Care Research Support Office, National Center Hospital East, Kashiwa-City, Chiba, Japan