Rikuhei Tsuchida1)/Hiroaki Abe2)/Reo Inoue1)/Kazuhito Mietani1)/Kenji Azuma2)/Masahiko Sumitani2):Department of Anesthesiology and Pain Relief Center, The University of Tokyo Hospital1):Department of Pain and Palliative Medicine, The University of Tokyo Hospital2)(東京大学医学部附属病院麻酔科・痛みセンター1)/東京大学医学部附属病院緩和ケア診療部2))