Chapter 4: European guidelines for the management of chronic nonspecific low back pain - Airaksinen, O; Brox, J I; Cedraschi, C; Hildebrandt, J; Klaber-Moffett, J; Kovacs, F; Mannion, A F; Reis, S; Staal, J B; Ursin, H; Zanoli, G (Eur Spine J, 2006)