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J

John K. Marshall

mcmaster university

75H-index
565Paper Count
2.5WCitation Count
Published Papers 163
Publication Date
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IL23R genetic variants associate with Crohn's disease risk and microbiome changes in healthy first-degree relatives
errClinical Gastroenterology and Hepatology
IF12
err2026-05-27
err0
PREAI
errHaim Leibovitzh; Anna Neustaeter; Sun-Ho Lee; Mingyue Xue; Osvaldo Espin-Garcia; Pablo A. Olivera; Hien Q. Huynh; Anne M. Griffiths; Dan Turner; Karen L. Madsen; Mark S. Silverberg; A. Hillary Steinhart; David R. Mack; Kevan Jacobson; Paul Moayyedi; Guy Aumais; Charles N. Bernstein; John K. Marshall; Remo Panaccione; Wei Xu
errShare
errSave
Effectiveness and Safety of Advanced Combination Treatment in Patients With Refractory Inflammatory Bowel Disease or Concomitant Immune-Mediated Disease or Extraintestinal Manifestations: A Multicenter Canadian Study
errAmerican Journal of Gastroenterology
IF7.6
err2026-02-01
err3
PREAI
errSolitano, Virginia; Ogunsakin, Ropo Ebenezer; Yuan, Yuhong; Bernstein, Charles N.; Bessissow, Talat; Bressler, Brian; Hoentjen, Frank; Van Lierop, Lisa; Leung, Yvette; Ma, Christopher; Marshall, John Kenneth; Narula, Neeraj; Alahmari, Mohammed; Mccurdy, Jeffrey D.; Murthy, Sanjay; Panaccione, Remo; Rosenfeld, Greg; Milgrom, Raquel; Silverberg, Mark; Jairath, Vipul
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errSave
Patients with ulcerative colitis that have endoscopic Mayo score 1 and active histologic inflammation have similar outcomes to mild-moderate patients with Mayo score 2: a post hoc analysis of the VARSITY trial
errEUROPEAN JOURNAL OF GASTROENTEROLOGY & HEPATOLOGY
IF1.8
err2026-01-01
err0
PREAI
errWong, Emily C. L.; Khan, Nazmus; Dulai, Parambir S.; Marshall, John K.; Jairath, Vipul; Reinisch, Walter; Narula, Neeraj
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errSave
Combination Therapy With Fecal Microbiota Transplantation and Vedolizumab for Induction of Remission in Ulcerative Colitis: An Open-Label Pilot Study
errINFLAMMATORY BOWEL DISEASES
IF4.3
err2025-12-01
err0
errOAAI
errSyed, Saad; Moayyedi, Paul; Kao, Dina; Patel, Jaiminkumar; Marshall, John K.; Surette, Michael; Narula, Neeraj
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errSave
Serum and Histologic Eosinophilia as a Predictive Biomarker of Response to Mirikizumab in Ulcerative Colitis
errINFLAMMATORY BOWEL DISEASES
IF4.3
err2025-11-01
err0
PREAI
errWong, Emily C. L.; Dulai, Parambir S.; Marshall, John K.; Jairath, Vipul; Reinisch, Walter; Narula, Neeraj
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errSave
A Review of the Modified Multiplier of Simple Endoscopic Score for Crohn's Disease and How to Use It in Clinical Trials and Practice
errAMERICAN JOURNAL OF GASTROENTEROLOGY
IF7.6
err2025-10-01
err0
PREAI
errHuan, Peter W.; Mehta, Akash; Wong, Emily C. L.; Dulai, Parambir S.; Marshall, John K.; Reinisch, Walter; Narula, Neeraj
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errSave
Addition of baseline histology and fecal calprotectin does not reduce placebo rates in ulcerative colitis clinical trials: post-hoc analysis of patient-level data
errJOURNAL OF CROHNS & COLITIS
IF8.7
err2025-10-01
err0
PREAI
errWong, Emily C. L.; Marshall, John K.; Ma, Christopher; Jairath, Vipul; Dulai, Parambir S.; Reinisch, Walter; Narula, Neeraj
errShare
errSave
Anti-TNF Therapies Promote a Proximal-to-Distal Healing Pattern in Moderate-to-Severe Ulcerative Colitis
errINFLAMMATORY BOWEL DISEASES
IF4.3
err2025-09-01
err0
errOAAI
errWong, Emily C. L.; Dulai, Parambir S.; Marshall, John K.; Jairath, Vipul; Reinisch, Walter; Narula, Neeraj
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errSave
Diagnostic Accuracy of Noninvasive Biomarkers and Imaging for Evaluating Postoperative Recurrence in Crohn’s Disease
errClinical Gastroenterology and Hepatology
IF12
err2025-06-02
err0
errOAAI
errSunil Samnani; Christina M. Ray; Priyanka Gill; Levi Stein; Katherine A. Buhler; Rupert W. Leong; Rebecca L. Smith; Peter De Cruz; Gilaad G. Kaplan; Cynthia H. Seow; Cathy Lu; Leonardo Guizzetti; Frank Hoentjen; John K. Marshall; Siddharth Singh; Remo Panaccione; Kerri L. Novak; Christopher Ma
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errSave
Comparative Predictive Utility of MM-SES-CD and SES-CD for Week 52 Endoscopic Remission in the Ileum and Colon in Crohn's Disease
errINFLAMMATORY BOWEL DISEASES
IF4.3
err2025-06-01
err0
errOAAI
errWong, Emily C. L.; Dulai, Parambir S.; Marshall, John K.; Jairath, Vipul; Reinisch, Walter; Narula, Neeraj
errShare
errSave
Validation of the Modified Multiplier of SES-CD (MM-SES-CD) to Predict Endoscopic Healing in Crohn's Disease: A Post Hoc Analysis of the SEAVUE Trial
errINFLAMMATORY BOWEL DISEASES
IF4.3
err2025-06-01
err1
PREAI
errAhuja, Dhruv; Anvari, Sama; Wong, Emily C. L.; Dulai, Parambir; Marshall, John K.; Jairath, Vipul; Reinisch, Walter; Narula, Neeraj
errShare
errSave
AI explainability in oculomics: How it works, its role in establishing trust, and what still needs to be addressed
errPROGRESS IN RETINAL AND EYE RESEARCH
IF14.7
err2025-05-01
err0
errOAAI
errAn, Songyang; Teo, Kelvin; McConnell, Michael, V; Marshall, John; Galloway, Christopher; Squirrell, David
errShare
errSave
Effectiveness and Safety of Advanced Combination Treatment (ACT) in patients with refractory inflammatory bowel disease or concomitant immune mediated disease or extra-intestinal manifestations: A Multi-Center Canadian Study
errJOURNAL OF CROHNS & COLITIS
IF8.7
err2025-01-22
err0
PREAI
errSolitano, V; Ogunsakin, R. E.; Yuan, Y.; Bernstein, C. N.; Bessisow, T.; Bressler, B.; Hoentjen, F.; van Lierop, L.; Leung, Y.; Ma, C.; Marshall, J. K.; Narula, N.; Alahmari, M.; Mccurdy, J.; Murthy, S.; Panaccione, R.; Milgrom, R.; Rosenfeld, G.; Silverberg, M.; Jairath, V
errShare
errSave
A cost comparison of treatment sequencing for Ulcerative Colitis: vedolizumab vs ustekinumab as a second-line biologic in anti-TNF-exposed patients in Canada
errJOURNAL OF CROHNS & COLITIS
IF8.7
err2025-01-22
err0
PREAI
errMartin, M.; Zhou, J. Y.; Mac, S.; Kao, K. E.; Johnston, K.; Marshall, J. K.
errShare
errSave
Cost-effectiveness of vedolizumab vs. ustekinumab as first-line biologic in treatment sequencing for ulcerative colitis in Canada
errJOURNAL OF CROHNS & COLITIS
IF8.7
err2025-01-22
err0
PREAI
errKao, K. E.; Zhou, J. Y.; Mac, S.; Martin, M.; Johnston, K.; Marshall, J. K.
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errSave
The association between fermentable dietary fibre intake and risk of developing Crohn's Disease: Results from the GEM Project
errJOURNAL OF CROHNS & COLITIS
IF8.7
err2025-01-22
err0
PREAI
errMcshane, C.; Xue, M.; Kim, J.; Leibovitzh, H.; Shao, J.; Li, Q.; Madsen, K.; Khorasaniha, R.; Griffiths, A. M.; Walters, T.; Steinhart, H.; Silverberg, M.; Dieleman, L. A.; Huynh, H. Q.; Panacionne, R.; Beck, P.; Aumais, G.; Wrobel, I; Bitton, A.; Marshall, J.; Bernstein, C. N.; Hyams, J.; Moayyedi, P.; Lee, S. H.; Armstrong, H.; Croitoru, K.; Turpin, W.; Crohns Colitis Canada GEM Project Res Consortium
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errSave
Improvement in serum eosinophilia is observed in clinical responders to ustekinumab but not adalimumab in inflammatory bowel disease
errJOURNAL OF CROHNS & COLITIS
IF8.7
err2025-01-13
err0
PREAI
errWong, Emily C. L.; Dulai, Parambir S.; Marshall, John K.; Jairath, Vipul; Reinisch, Walter; Narula, Neeraj
errShare
errSave
Use of Modified Multiplier of the Simple Endoscopic Score for Crohn's Disease Endoscopic Improvement Thresholds Enhances Effect Size Differentiation Between Adalimumab Versus Placebo: A Post Hoc Analysis of the EXTEND Trial
errJOURNAL OF CROHNS & COLITIS
IF8.7
err2024-11-12
err0
errOAAI
errWong, Emily C. L.; Dulai, Parambir S.; Marshall, John K.; Laroux, Stephen; Jairath, Vipul; Reinisch, Walter; Narula, Neeraj
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errSave
Outcomes of Patients With Prior Biologic Intolerance Are Better Than Those With Biologic Failure in Clinical Trials of Inflammatory Bowel Disease
errJOURNAL OF CROHNS & COLITIS
IF8.7
err2024-09-20
err0
PREAI
errSamnani, Sunil; Wong, Emily C. L.; Hamam, Hasan; Dulai, Parambir S.; Marshall, John K.; Jairath, Vipul; Reinisch, Walter; Narula, Neeraj
errShare
errSave
Environmental Factors Associated With Risk of Crohn's Disease Development in the Crohn's and Colitis Canada - Genetic, Environmental, Microbial Project
errCLINICAL GASTROENTEROLOGY AND HEPATOLOGY
IF12
err2024-09-01
err0
PREAI
errXue, Mingyue; Leibovitzh, Haim; Shao, Jingcheng; Neustaeter, Anna; Dong, Mei; Xu, Wei; Espin-Garcia, Osvaldo; Griffiths, Anne M.; Steinhart, A. Hillary; Turner, Dan; Huynh, Hien Q.; Dieleman, Levinus A.; Panaccione, Remo; Aumais, Guy; Bressler, Brian; Bitton, Alain; Murthy, Sanjay; Marshall, John K.; Hyams, Jeffrey S.; Otley, Anthony; Bernstein, Charles N.; Moayyedi, Paul; El-Matary, Wael; Fich, Alexander; Denson, Lee A.; Ropeleski, Mark J.; Abreu, Maria T.; Deslandres, Colette; Cino, Maria; Avni-Biron, Irit; Lee, Sun-Ho; Turpin, Williams; Croitoru, Kenneth
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errSave

Research Directions

No research directions
Co-authors
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