RT Journal Article SR Electronic T1 Low back pain: Living with ambiguity JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 407 OP 410 VO 64 IS 8 A2 Wilke, William S. A1 Mazanec, Daniel YR 1997 UL http://www.ccjm.org/content/64/8/407.abstract AB