Best-practice-recommendations for objectives, contents and methods in the outpatient and inpatient rehabilitation of chronic low back pain - Hofmann, J; Böhle, E; Bork, H; Brüggemann, S; Greitemann, B; Hildebrandt, J; Kladny, B; Pfeifer, K (Phys Med Rehabil Kurortmed, 2010)