RT Journal Article SR Electronic T1 A 52-year-old man with fentanyl-induced muscle rigidity JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E539 OP E541 DO 10.1503/cmaj.171468 VO 190 IS 17 A1 Jane A. Buxton A1 Tim Gauthier A1 Mai-Lei Woo Kinshella A1 Jesse Godwin YR 2018 UL http://www.cmaj.ca/content/190/17/E539.abstract AB