Associate Professor Gareth Walker
Conjoint Staff Specialist – Clinical Lead for Inflammatory Bowel Disease (IBD) service, Departmental Lead for Research
Frazer Institute
Journal Articles
Etchegaray, Amirah, Tambakis, George, Kumar, Rina, Croft, Anthony, Radford-Smith, Graham and Walker, Gareth J. (2025). Sequential rescue therapy with JAK inhibitors in corticosteroid and infliximab-refractory acute severe ulcerative colitis: a case series. Therapeutic Advances in Gastroenterology, 18 17562848251323511, 1-14. doi: 10.1177/17562848251323511
Croft, Anthony, Okano, Satomi, Hartel, Gunter, Lord, Anton, Walker, Gareth, Tambakis, George and Radford-Smith, Graham (2024). A personalised algorithm predicting the risk of intravenous corticosteroid failure in acute ulcerative colitis. Alimentary Pharmacology and Therapeutics, 60 (7), 921-933. doi: 10.1111/apt.18190
Yu, Natalie, Sriranganathan, Danujan, Walker, Gareth J., Sazonovs, Aleksejs, Wilding, Helen, Roberts, Christopher, Kennedy, Nicholas A, Ahmad, Tariq, Boyapati, Ray K, Ding, Nik S and Segal, Jonathan P (2023). Prevalence of NUDT15 genetic variants and incidence of thiopurine-induced leukopenia in inflammatory bowel disease: a systematic review and meta-analysis. Journal of Crohn's and Colitis, 17 (12), 1920-1930. doi: 10.1093/ecco-jcc/jjad107
Conference Papers
Ghali, M., Wu, R., Haifer, C., Lynch, K., Ng, W. S., Begun, J., Lawrance, I. C., Radford-Smith, G. L., Walker, G., Shahzad, A., Boyapati, R. K., Rivas, C., Caquilpan,, Wilson, W., Connor, S. J., Andrews, J. M. and Ghaly, S. (2026). Prescribing Patterns and Persistence of Advanced Therapies in people with Crohn's disease with prior advanced therapy: Crohn's Colitis Cure Data Insights Program. 21st Congress of ECCO, Stockholm, Sweden, 18-21 February 2026. Oxford, United Kingdom: Oxford University Press. doi: 10.1093/ecco-jcc/jjaf231.814
Wu, R., Ghali, M., Wilson, W., Caquilpan,, Rivas, C., Lynch, K., Haifer, C., Walker, G., Radford-Smith, G. L., Lawrance, I. C., Begun, J., Wark, G., Verdon, C., Andrews, J. M., Ghaly, S. and Connor, S. J. (2026). Prescribing patterns and persistence of advanced therapies in people with Ulcerative Colitis who are bio-experienced: Insights from the Crohn's Colitis Care (CCCare) registry. 21st Congress of ECCO, Stockholm, Sweden, 18-21 February 2026. Oxford, United Kingdom: Oxford University Press. doi: 10.1093/ecco-jcc/jjaf231.804
Su, W. K., Wilson, W., Wark, G., Walker, G., Su, H., Forbes, A., Kim, A., Giles, E., Lawrance, I., Dutt, S., Brett, L., Begun, J., Lynch, K., Andrews, J. M. and Connor, S. J. (2025). Variation in healthcare utilisation amongst IBD care centres in Australia and New Zealand, Crohn's Colitis Care Data Insight's Program. 20th Congress of ECCO, Berlin, Germany, 19-22 February 2025. Oxford, United Kingdom: Oxford University Press. doi: 10.1093/ecco-jcc/jjae190.0515
Alsulaibi, O., Su, W. K., Wilson, W., Sin, L., Ng, W., Walker, G., Forbes, A., Lawrance,, Lynch, K., Begun, J., Connor, S. J. and Andrews, J. M. (2025). Mortality and comorbidities in people with Inflammatory Bowel Disease - Crohn's Colitis Cure data insights program. 20th Congress of ECCO, Berlin, Germany, 19-22 February 2025. Oxford, United Kingdom: Oxford University Press. doi: 10.1093/ecco-jcc/jjae190.0742
Rivas, C., Su, W. K., Wilson, W., Ng, W., Ghaly, S., Walker, G., Forbes, A., Su, H., Schultz, M., Lawrance,, Dutt, S., Brett, L., Begun, J., Lynch, K., Andrews, J. M. and Connor, S. (2025). Patterns and predictors of steroid use in people with IBD in routine care across ANZ. 20th Congress of ECCO, Berlin, Germany, 19-22 February 2025. Oxford, United Kingdom: Oxford University Press. doi: 10.1093/ecco-jcc/jjae190.1306
Alsulaibi, Owen, Su, Wai Kin, Wilson, William, Sin, Hiu Ching Letisia, Ng, Watson, Walker, Gareth, Forbes, Angela, Lawrance, Ian, Lynch, Kate, Begun, Jakob, Connor, Susan J. and Andrews, Jane (2024). Mortality in inflammatory bowel disease: Crohn's Colitis Cure (CCC) data insights program. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Etchegaray, Amirah, Tambakis, George, Croft, Anthony, Radford-Smith, Graham and Walker, Gareth (2024). Sequential rescue therapy with Janus kinase-inhibitors in corticosteroid and infliximab-refractory acute severe ulcerative colitis. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Pinnuck, Brigid, Su, Wai Kin, Wilson, William, Pipicella, Joseph, Wark, Gabrielle, Arcidiacono, Michele, Walker, Gareth, Forbes, Angela, Su, Heidi, Schultz, Michael, Lawrance, Ian, Dutt, Shoma, Brett, Laurel, Lynch, Kate, Andrews, Jane and Connor, Susan J. (2024). Corticosteroid and opiate use in inflammatory bowel disease, 25 years after the TREAT Registry was established. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Nano, Dominique, Su, Wai Kin, Mcnamara, Jack, Wilson, William, Arzivian, Arteen, Williams, Astrid-Jane, Walker, Gareth, Forbes, Angela, Su, Heidi, Giles, Edward, Lawrance, Ian, Dutt, Shoma, Lynch, Kate, Brett, Laurel, Begun, Jakob, Andrews, Jane and Connor, Susan J. (2024). The psycho-social impact of fistulising perianal Crohn's disease in Australasia: Crohn's Colitis Cure (CCC) data insights program. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Su, Wai Kin, Mcnamara, Jack, Pipicella, Joseph, Wilson, William, Ghaly, Simon, Cabaero, Aura Gesha, Walker, Gareth, Forbes, Angela, Su, Heidi, Brett, Laurel, Dutt, Shoma, An, Yoon-Kyo, Lawrance, Ian, Lynch, Kate, Andrews, Jane and Connor, Susan J. (2024). Documented variation in inflammatory bowel disease care in Australasia : Crohn's Colitis Cure (CCC) data insights program. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Su, Wai Kin, Wilson, William, Ng, Watson, Whittaker, Clair, Giles, Edward, Walker, Gareth, Forbes, Angela, Lawrance, Ian, Dutt, Shoma, Lynch, Kate, Brett, Laurel, An, Yoon-Kyo, Connor, Susan J. and Andrews, Jane (2024). Dose escalated therapy improving outcomes in inflammatory bowel disease: Crohn's Colitis Cure (CCC) data insights program. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Seng, Crystal, Su, Wai Kin, Wilson, William, Haifer, Craig, Williams, Astrid-Jane, Forbes, Angela, Lawrance, Ian, Lynch, Kate, Brett, Laurel, Begun, Jakob, Connor, Susan J., Andrews, Jane and Walker, Gareth (2024). A cross section of inflammatory bowel disease management in older persons in Australasia: Crohn's Colitis Cure (CCC) data insights program. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Su, Wai Kin, Wilson, William, Pipicella, Joseph, Haifer, Craig, Williams, Astrid-Jane, Lynch, Kate, Forbes, Angela, Walker, Gareth, Schultz, Michael, Lawrance, Ian, An, Yoon-Kyo, Brett, Laurel, Connor, Susan J. and Andrews, Jane (2024). The real-world use of five aminosalicylate treatment for ulcerative colitis: Crohn's Colitis Cure (CCC) data insights program. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Kaazan, Patricia, Su, Wai Kin, Rayner, Christopher, Walker, Gareth, Wilson, William, Dinoy, Elaine, Wark, Gabrielle, Forbes, Angela, Schultz, Michael, Yap, Jia, Lawrance, Ian, Dutt, Shoma, Lynch, Kate, Brett, Laurel, Begun, Jakob, Andrews, Jane and Connor, Susan J. (2024). The prevalence and impact of obesity in an ANZ cohort of people with inflammatory bowel disease: Crohn's Colitis Cure (CCC) data insights program. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Su, Wai Kin, Pipicella, Joseph, Wilson, William, Kim, Andrew, Davidson, Chloe, Giles, Edward, Walker, Gareth, Forbes, Angela, Su, Heidi, Lawrance, Ian, Dutt, Shoma, Lynch, Kate, Brett, Laurel, Begun, Jakob, Connor, Susan J. and Andrews, Jane (2024). Healthcare utilisation in people with inflammatory bowel disease: Crohn's Colitis Cure (CCC) data insights program. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Pinnuck, Brigid, Su, Wai Kin, Wilson, William, Pipicella, Joseph, Ng, Watson, Antoniades, Sally, Walker, Gareth, Forbes, Angela, Dutt, Shoma, Lynch, Kate, Connor, Susan J. and Andrews, Jane (2024). Iron deficiency with or without anaemia continues to be an issue in inflammatory bowel disease: Crohn's Colitis Cure (CCC) data insights program. Gastroenterological Society of Australia (GESA) Australian Gastroenterology Week (AGW) 2024, Adelaide, SA Australia, 14-16 September 2024. Richmond, VIC Australia: John Wiley & Sons.
Pipicella, J. L., McNamara, J., Wilson, W., Lynch, K., Walker, G., Begun, J., Lawrance,, Ghaly, S., Radford-Smith, G., Williams, A. J., Gearry, R., Schultz, M., Brett, L., Andrews, J. M. and Connor, S. J. (2024). The real-world use of five-aminosalicylate (5ASA) treatment for Ulcerative Colitis in Australia and New Zealand: Crohn's Colitis Cure (CCC) data insight's program. 19th Congress of ECCO Stockholm, Stockholm, Sweden, 21-24 February 2024. Oxford, United Kingdom: Oxford University Press. doi: 10.1093/ecco-jcc/jjad212.1010