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  1. Excluded Studies - Noninvasive Treatments for Low Back Pain - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK350267
    ... 1702–9. [ PubMed : 12195058 ] Petersen T, Larsen K, Jacobsen S. One-year follow-up comparison of the effectiveness ... SJ, Jacobs A, Goldfarb J. EMG biofeedback training, relaxation training, and placebo for the relief ... of short-term response to two spinal manipulation techniques for patients with low back pain in a ...