RT Journal Article SR Electronic T1 Prognosis in people with back pain JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1229 OP 1230 DO 10.1503/cmaj.120627 VO 184 IS 11 A1 Rachelle Buchbinder A1 Martin Underwood YR 2012 UL http://www.cmaj.ca/content/184/11/1229.abstract AB