RT Journal Article SR Electronic T1 Does lumbar surgery for chronic low-back pain make a difference? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 365 OP 366 DO 10.1503/cmaj.050884 VO 173 IS 4 A1 Mohit Bhandari A1 Brad Petrisor A1 Jason W. Busse A1 Brian Drew YR 2005 UL http://www.cmaj.ca/content/173/4/365.abstract