“…Classification and Prognosis: The Task Force did not undertake a systematic literature review, but considered previous work on back pain taxonomy, (4,6,15,24,33,34,44,52,56,74,79,83,101,104,105,117) prognostic classification, (13,19,31,38,39,43,48,49,53,54,(57)(58)(59)(60)(66)(67)(68)73,76,80,82,85,86,97,106,108,110,(112)(113)(114)(115)(116)122) pain and psychosocial measures, (12,31,...…”