Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) H Merskey,The definition of pain,European Psychiatry,0924-9338,Cambridge University Press (CUP),1991,6,4,153-159,https://cir.nii.ac.jp/crid/1363388843679202432,https://doi.org/10.1017/s092493380000256x