Alzahrani, Hosam, Martin Mackey, Emmanuel Stamatakis, Marina B. Pinheiro, and Debra Shirley. 2019. “Accelerometer-Based Facilitated Walking Program in Addition to Usual Care for the Management of Patients With Low Back Pain at Medium or High Risk of Chronicity: A Randomised Controlled Trial Protocol”. International Journal of Clinical Trials 6 (1):23-32. https://doi.org/10.18203/2349-3259.ijct20190258.