Alexander, J., Kennedy, N., Ibraheim, H., Anandabaskaran, S., Saifuddin, A., Castro Seoane, R., Liu, Z., Nice, R., Bewshea, C., D'Mello, A., Constable, L., Jones, G., Balarajah, S., Fiorentino, F., Sebastian, S., Irving, P., Hicks, L., Williams, H., Kent, A., Linger, R., Parkes, M., Kok, K., Patel, K., Teare, J., Altmann, D., Boyton, R., Goodhand, J., Hart, A., Lees, C., Ahmad, T. & Powell, N. 2022, 'COVID-19 vaccine-induced antibody responses in immunosuppressed patients with inflammatory bowel disease (VIP): a multicentre, prospective, case-control study', The Lancet Gastroenterology & Hepatology, 7(4), pp. 342-352. https://doi.org/10.1016/S2468-1253(22)00005-X