RT Journal Article SR Electronic T1 Deaths related to the use of prescription opioids JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 881 OP 882 DO 10.1503/cmaj.091791 VO 181 IS 12 A1 Benedikt Fischer A1 Jürgen Rehm YR 2009 UL http://www.cmaj.ca/content/181/12/881.abstract