Foster, N. E., Mullis, R., Hill, J. C., Lewis, M., Whitehurst, D. G. T., Doyle, C., …Study team, I. B. (2014). Effect of Stratified Care for Low Back Pain in Family Practice (IMPaCT Back): A Prospective Population-Based Sequential Comparison. Annals of Family Medicine, 12(2), 102-111. https://doi.org/10.1370/afm.1625