[1] Kyoto Prefectural Univ Med, Dept Hosp Pharm, Kamigyo Ku, Kyoto 6028566, Japan
[2] Kyoto Prefectural Univ Med, Dept Pain Treatment, Univ Hosp, Kyoto 6028566, Japan
[3] Kyoto Prefectural Univ Med, Palliat Care Unit, Univ Hosp, Kyoto 6028566, Japan
[4] Kyoto Prefectural Univ Med, Dept Anesthesiol, Grad Sch Med Sci, Kyoto 6028566, Japan
[5] Kyoto Prefectural Univ Med, Dept Pain Management & Palliat Care Med, Kyoto 6028566, Japan