Letter to the editor on: Hanna B. Albert, Eva Hauge, Claus Manniche (2011) Centralization in patients with sciatica: are pain responses to repeated movement and positioning associated with outcome or types of disc lesions? Eur Spine J. doi:10.1007/s00586-011-2018-9

Albert HB, Hauge E, Manniche C (2011) Centralization in patients with sciatica: are pain responses to repeated movement and positioning associated with outcome or types of disc lesions? Eur Spine J [Epub ahead of print]. doi:10.1007/s00586-011-2018-9 Albert HB, Manniche C (2011) The efficacy of systematic active conservative treatment for patients with severe sciatica. Spine [Epub ahead of print]. doi:10.1097/BRS.0b013e31821ace7f Clare HA, Adams R, Maher CG (2005) Reliability of McKenzie classification of patients with cervical or lumbar pain. J Manip Physiol Ther 28(2):122–127 Kilpikoski S, Airaksinen O, Kankaanpaa M, Leminen P, Videman T, Alen M (2002) Interexaminer reliability of low back pain assessment using the McKenzie method. Spine (Phila Pa 1976) 27(8):E207–E214 Werneke M, Hart DL, Cook D (1999) A descriptive study of the centralization phenomenon. A prospective analysis. Spine (Phila Pa 1976) 24(7):676–683 Werneke MW, Hart DL, Resnik L, Stratford PW, Reyes A (2008) Centralization: prevalence and effect on treatment outcomes using a standardized operational definition and measurement method. J Orthop Sports Phys Ther 38(3):116–125