RT Journal Article SR Electronic T1 Analgesia through endogenous cannabinoids JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 357 OP 357 DO 10.1503/cmaj.050830 VO 173 IS 4 A1 Secko, David YR 2005 UL http://www.cmaj.ca/content/173/4/357.abstract