A prospective, case-control study of COVID-19 vaccine-induced antibody responses in immunosuppressed patients with IBD - Alexander, J; Powell, N; Liu, Z; Constable, L; Ibraheim, H; Anandabaskaran, S; Saifuddin, M; Castro, Seoane R; Balarajah, S; Hicks, L; Williams, H; Teare, J; et al. (The Lancet Gastroenterology & Hepatology, 2022)