We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleImperfect placebos are common in low back pain trials: a systematic review of the literatureAuthorsMachado, L.; Kamper, S.; Herbert, R.; Maher, C.; McAuley, J.PublicationEuropean Spine Journal, 2008, Vol 17, Issue 7, p889ISSN0940-6719Publication typearticleDOI10.1007/s00586-008-0664-3