RT Journal Article SR Electronic T1 Regulated analgesics and pain control JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1470 OP 1470 VO 154 IS 10 A1 N. A. Hagen A1 P. Flynne A1 N. Macdonald YR 1996 UL http://www.cmaj.ca/content/154/10/1470.abstract