Opstelten, J. L., Leenders, M., Dik, V. K., Chan, S. S. M., van Schaik, F. D. M., Khaw, K., Luben, R., Hallmans, G., Karling, P., Lindgren, S., Grip, O., Key, T. J., Crowe, F. L., Boeing, H., Bergmann, M. M., Overvad, K., Palli, D., Masala, G., Racine, A., Carbonnel, F., Boutron-Ruault, M., Tjønneland, A., Olsen, A., Andersen, V., Kaaks, R., Katzke, V. A., Tumino, R., Trichopoulou, A., Siersema, P. D., Bueno-de-Mesquita, H. B., Hart, A. R., & Oldenburg, B. (n.d.). dairy Products, Dietary Calcium, and Risk of Inflammatory Bowel Disease. Inflammatory bowel diseases, 22(6), . http://access.bl.uk/ark:/81055/vdc_100041981735.0x000017