Alzahrani, H., Mackey, M., Stamatakis, E., Pinheiro, M. B., & Shirley, D. (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