Cook, K. F., Dunn, W., Griffith, J. W., Morrison, M. T., Tanquary, J., Sabata, D., . . . Gershon, R. C. (2013). Pain assessment using the NIH Toolbox. Neurology, 80(11 Supplement 3), S49-S53. http://dx.doi.org/10.1212/WNL.0b013e3182872e80