Walentynowicz, M., van de Pavert, I., Fierens, L., Coenen, S., Vlaeyen, J. W. S., von Leupoldt, A., Van Oudenhove, L., Vermeire, S., Van Assche, G., Ferrante, M., & Van Diest, I. (2021). Inflammatory Bowel Disease-related Behaviours [IBD-Bx] Questionnaire: Development, Validation and Prospective Associations with Fatigue. Journal of Crohn’s and Colitis. Accepted/in-press. https://doi.org/10.1093/ecco-jcc/jjab174 (Original work published 2021)