Imperial College London


Faculty of MedicineDepartment of Metabolism, Digestion and Reproduction

Honorary Clinical Senior Lecturer



+44 (0)20 3312 1208h.williams




GI UnitClarence WingSt Mary's Campus






Liu Z, Alexander J, Le K, et al., 2023, Neutralising antibody responses against SARS-CoV-2 Omicron BA.4/5 and wild-type virus in patients with inflammatory bowel disease following three doses of COVID-19 vaccine (VIP): a prospective, multicentre, cohort study, Eclinicalmedicine, ISSN:2589-5370

Liu Z, Alexander J, LIN K, et al., 2023, Infliximab and tofacitinib attenuate neutralizing antibody responses against SARS-CoV-2 ancestral and Omicron variants in IBD patients following 3 doses of COVID-19 vaccine, Gastroenterology, Vol:164, ISSN:0016-5085, Pages:300-303.e3

Jaggard MKJ, Boulange CL, Graca G, et al., 2023, The effect of liquid-liquid extraction on metabolite detection and analysis using NMR spectroscopy in human synovial fluid, Journal of Pharmaceutical and Biomedical Analysis, Vol:226, ISSN:0731-7085

Radhakrishnan ST, Gallagher KI, Mullish BH, et al., 2023, Rectal swabs as a viable alternative to faecal sampling for the analysis of gut microbiota functionality and composition, Scientific Reports, Vol:13, ISSN:2045-2322, Pages:1-9

Valdivia-Garcia MA, Chappell KE, Camuzeaux S, et al., 2022, Improved quantitation of short-chain carboxylic acids in human biofluids using 3-nitrophenylhydrazine derivatization and liquid chromatography with tandem mass spectrometry (LC-MS/MS), Journal of Pharmaceutical and Biomedical Analysis, Vol:221, ISSN:0731-7085

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