Grundt Larsen, Inge, Lisa Gregersen Oestergaard, Lene M. Thomsen, Claus Vinther Nielsen, and Berit Schiøttz-Christensen. 2019. “Effect of Adding Lay-Tutors to the Educational Part of a Back School Programme for Patients With Subacute, Non-Specific Low Back Pain: A Randomized Controlled Clinical Trial With a Two-Year Follow-up”. Journal of Rehabilitation Medicine 51 (9):698-704. https://doi.org/10.2340/16501977-2584.