Gewandter, J. S., Smith, S. M., Dworkin, R. H., Turk, D. C., Gan, T. J., Gilron, I., Hertz, S., Katz, N. P., Markman, J. D., Raja, S. N., Rowbotham, M. C., Stacey, B. R., Strain, E. C., Ward, D. S., Farrar, J. T., Kroenke, K., Rathmell, J. P., Rauck, R., Brown, C., Cowan, P., Edwards, R. R., Eisenach, J. C., Ferguson, M., Freeman, R., Gray, R., Giblin, K., Grol-Prokopczyk, H., Haythornthwaite, J., Jamison, R. N., Martel, M., McNicol, E., L. Oshinsky, M., Sandbrink, F., Scholz, J., Scranton, R., Simon, L. S., Steiner, D., Verburg, K., Wasan, A. D., & Wentworth, K. (2021). research approaches for evaluating opioid sparing in clinical trials of acute and chronic pain treatments. Pain, 162(11), . http://access.bl.uk/ark:/81055/vdc_100174361239.0x000015