De Graaf, M. C. G., Lawton, C. L., Croden, F., Smolinska, A., Winkens, B., Hesselink, M. A. M., Van Rooy, G., Weegels, P. L., Shewry, P. R., Houghton, L. A., Witteman, B. J. M., Keszthelyi, D., Brouns, F. J. P. H., Dye, L. and Jonkers, D. M. A. E. 2023. The effect of expectancy versus actual gluten intake on gastrointestinal and extra-intestinal symptoms in non-coeliac gluten sensitivity - a randomised, double-blind, placebo-controlled, international, multicentre study. Lancet Gastroenterology and Hepatology. 9 (2), pp. 110-123. https://doi.org/10.1016/S2468-1253(23)00317-5