Aboagye, Emmanuel, Malin Lohela Karlsson, Jan Hagberg, and Irene Jensen. 2014. “Cost-Effectiveness of Early Interventions for Non-Specific Low Back Pain: A Randomized Controlled Study Investigating Medical Yoga, Exercise Therapy and Self-Care Advice”. Journal of Rehabilitation Medicine 47 (2):167-73. https://doi.org/10.2340/16501977-1910.