Paatelma, Markku, Sinikka Kilpikoski, Riitta Simonen, Ari Heinonen, Markku Alen, and Tapio Videman. 2008. “Orthopaedic Manual Therapy, McKenzie Method or Advice Only for Low Back Pain in Working Adults: A Randomized Controlled Trial With One Year Follow-Up”. Journal of Rehabilitation Medicine 40 (10):858-63. https://doi.org/10.2340/16501977-0262.