R. Pollok

M. Hotopf, S. Saxena, I. Petersen, 2020, Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association.

HLA-DQA1*05 Carriage Associated With Development of Anti-Drug Antibodies to Infliximab and Adalimumab in Patients With Crohn's Disease.

J. Barrett, M. Tremelling, M. Parkes, 2019, Gastroenterology.

Supported online self-management versus care as usual for symptoms of fatigue, pain and urgency/incontinence in adults with inflammatory bowel disease (IBD-BOOST): study protocol for a randomised controlled trial

Stephanie J. C. Taylor, S. Saxena, Q. Aziz, 2021, Trials.

Association between antidepressant medication use and steroid dependency in patients with ulcerative colitis: a population-based study

M. Hotopf, S. Saxena, I. Petersen, 2021, BMJ open gastroenterology.

Assessment, endoscopy, and treatment in patients with acute severe ulcerative colitis during the COVID-19 pandemic (PROTECT-ASUC): a multicentre, observational, case-control study

Philip Smith, C. Lees, N. Bhala, 2021, The Lancet Gastroenterology & Hepatology.

Organisational changes and challenges for inflammatory bowel disease services in the UK during the COVID-19 pandemic

C. Lees, N. Bhala, C. Lamb, 2020, Frontline Gastroenterology.

The Impact of Timing and Duration of Thiopurine Treatment on First Intestinal Resection in Crohn's Disease: National UK Population-Based Study 1989–2010

A. Majeed, S. Saxena, V. Curcin, 2014, The American Journal of Gastroenterology.

Factors associated with vitamin D deficiency in a multicultural inflammatory bowel disease cohort

A. Poullis, P. Neild, R. Pollok, 2012, Frontline Gastroenterology.

The historical role and contemporary use of corticosteroids in inflammatory bowel disease.

C. Selinger, T. Raine, G. Parkes, 2020, Journal of Crohn's & colitis.

Interleukin-4 and Transforming Growth Factor β Have Opposing Regulatory Effects on Gamma Interferon-Mediated Inhibition of Cryptosporidium parvum Reproduction

S. McDonald, R. Pollok, M. Farthing, 2003, Infection and Immunity.

Prevalence and duration of gastrointestinal symptoms before diagnosis of Inflammatory Bowel Disease and predictors of timely specialist review: a population-based study.

M. Hotopf, S. Saxena, I. Petersen, 2020, Journal of Crohn's & colitis.

The Epidemiology of Community Clostridium difficile Infection: A Five-Year Population-Based Study on the Bailiwick of Jersey, Channel Islands

T. Planche, R. Pollok, I. Chis Ster, 2018, Infection Control & Hospital Epidemiology.

Steroid use and misuse: a key performance indicator in the management of IBD

C. Selinger, T. Raine, G. Parkes, 2020, Frontline Gastroenterology.

Vaccine escape, increased breakthrough and reinfection in infliximab-treated patients with IBD during the Omicron wave of the SARS-CoV-2 pandemic

C. Lees, T. Ahmad, L. Harries, 2022, Gut.

Infliximab is associated with attenuated immunogenicity to BNT162b2 and ChAdOx1 nCoV-19 SARS-CoV-2 vaccines in patients with IBD

C. Lees, T. Ahmad, C. Lamb, 2021, Gut.

Depression in individuals who subsequently develop inflammatory bowel disease: a population-based nested case–control study

M. Hotopf, S. Saxena, I. Petersen, 2020, Gut.

Systematic review of postoperative complications in patients with inflammatory bowel disease treated with immunomodulators

R. Pollok, V. Subramanian, D. Kumar, 2006, The British journal of surgery.

Assessment of steroid use as a key performance indicator in inflammatory bowel disease—analysis of data from 2385 UK patients

C. Selinger, T. Raine, J. Limdi, 2019, Alimentary pharmacology & therapeutics.

Impact of early thiopurines on surgery in 2770 children and young people diagnosed with inflammatory bowel disease: a national population‐based study

A. Majeed, S. Saxena, V. Curcin, 2015, Alimentary pharmacology & therapeutics.

Patients with Endoscopically Visible Polypoid Adenomatous Lesions Within the Extent of Ulcerative Colitis Have an Increased Risk of Colorectal Cancer Despite Endoscopic Resection

R. Pollok, V. Subramanian, S. Chatu, 2016, Digestive Diseases and Sciences.

Using corticosteroids appropriately in inflammatory bowel disease: a guide for primary care.

S. Saxena, R. Pollok, K. Barrett, 2018, The British journal of general practice : the journal of the Royal College of General Practitioners.

Increased health burden associated with Clostridium difficile diarrhoea in patients with inflammatory bowel disease

S. Saxena, A. Bottle, P. Aylin, 2011, Alimentary pharmacology & therapeutics.

Steroid dependency and trends in prescribing for inflammatory bowel disease – a 20‐year national population‐based study

A. Majeed, S. Saxena, V. Curcin, 2016, Alimentary pharmacology & therapeutics.

The impact of thiopurines on surgical outcomes in inflammatory bowel disease: do they make a difference?

R. Pollok, V. Chhaya, 2013, F1000prime reports.

Inflammatory bowel disease clinical service recovery during the COVID-19 pandemic

C. Lamb, G. Moran, D. Gaya, 2021, Frontline Gastroenterology.

PWE-106 Small Intestine Ultrasonography With Oral Contrast (sicus) For The Detection Of Small Bowel Complications In Crohn’s Disease: Correlation With Intra-operative Findings

R. Pollok, J. Pilcher, V. Chhaya, 2014, Gut.

Impact of thiopurines and anti-tumour necrosis factor therapy on hospitalisation and long-term surgical outcomes in ulcerative colitis.

R. Pollok, C. Alexakis, 2015, World journal of gastrointestinal surgery.

Emerging trends and risk factors for perianal surgery in Crohn’s disease: a 20-year national population-based cohort study

A. Majeed, S. Saxena, V. Curcin, 2016, European journal of gastroenterology & hepatology.

Current Practices in Ileal Pouch Surveillance for Patients With Ulcerative Colitis: A Multinational, Retrospective Cohort Study.

J. Sanderson, E. Dekker, R. Vega, 2019, Journal of Crohn's & colitis.

Role of thiopurines as disease-modifying agents in Crohn’s disease

S. Saxena, R. Pollok, J. Blackwell, 2018, Gut.

Implications for sequencing of biologic therapy and choice of second anti‐TNF in patients with inflammatory bowel disease: results from the IMmunogenicity to Second Anti‐TNF therapy (IMSAT) therapeutic drug monitoring study

Thomas M. Riley, C. Lees, T. Ahmad, 2022, Alimentary pharmacology & therapeutics.

Diverticular disease of the colon: ethnic differences in frequency

P. Neild, M. Benson, J. Maxwell, 2004, Alimentary pharmacology & therapeutics.

Renal and Urological Disorders Associated With Inflammatory Bowel Disease

Shankar Kumar, D. Goldsmith, R. Pollok, 2022, Inflammatory bowel diseases.

Diagnostic accuracy of small intestine ultrasonography using an oral contrast agent in Crohn's disease: comparative study from the UK.

S. Saxena, R. Pollok, J. Pilcher, 2012, Clinical radiology.

Do Thiopurines Reduce the Risk of Surgery in Elderly Onset Inflammatory Bowel Disease? A 20-Year National Population-Based Cohort Study

S. Saxena, V. Curcin, R. Pollok, 2017, Inflammatory bowel diseases.

Neutralising antibody potency against SARS-CoV-2 wild-type and omicron BA.1 and BA.4/5 variants in patients with inflammatory bowel disease treated with infliximab and vedolizumab after three doses of COVID-19 vaccine (CLARITY IBD): an analysis of a prospective multicentre cohort study

Sarah F. Griffee, Susan M. Kilroy, Philip Smith, 2022, The Lancet Gastroenterology & Hepatology.

Impact of Timing and Duration of Thiopurine Treatment on First Perianal Surgery in Crohn's Disease: UK Population-based Study (1995–2009)

A. Majeed, S. Saxena, V. Curcin, 2015, Inflammatory bowel diseases.

Comparative Outcomes of Budesonide MMX versus Prednisolone for Ulcerative Colitis: Results from a British Retrospective Multi-Centre Real-World Study

C. Selinger, Aditi Kumar, R. Pollok, 2021, Journal of clinical medicine.

Management of protozoa-related diarrhea in HIV infection

R. Pollok, S. Lean, 2003, Expert review of anti-infective therapy.

Cryptosporidiosis and Microsporidiosis

R. Pollok, 2001 .

Traveller's diarrhoea associated with cyanobacterium-like bodies

P. Chiodini, A. Moody, R. Pollok, 1992, The Lancet.

Clinical Features and HLA Association of 5-Aminosalicylate (5-ASA)-induced Nephrotoxicity in Inflammatory Bowel Disease.

M. Tremelling, M. Parkes, C. Lees, 2016, Journal of Crohn's & colitis.

The role of cytokines in the pathogenesis of Cryptosporidium infection

R. Pollok, V. Mcdonald, I-Sarah Lean, 2002, Current opinion in infectious diseases.

Exome Sequencing and Genotyping Identify a Rare Variant in NLRP7 Gene Associated With Ulcerative Colitis

J. Barrett, N. Prescott, J. Sanderson, 2017, bioRxiv.

Pooled Sequencing of 531 Genes in Inflammatory Bowel Disease Identifies an Associated Rare Variant in BTNL2 and Implicates Other Immune Related Genes

J. Barrett, M. Parkes, J. Satsangi, 2015, PLoS Genetics.

Association of Genetic Variants in NUDT15 With Thiopurine-Induced Myelosuppression in Patients With Inflammatory Bowel Disease

Samuel E. Jones, M. Rivas, M. Daly, 2019, JAMA.

AssociationofGeneticVariantsinNUDT15WithThiopurine-Induced Myelosuppression in Patients With Inflammatory Bowel Disease

M. Rivas, M. Daly, R. Xavier, 2019 .

Anti-SARS-CoV-2 antibody responses are attenuated in patients with IBD treated with infliximab

C. Lees, T. Ahmad, D. McGovern, 2021, Gut.

Diagnostic accuracy of magnetic resonance enterography and small bowel ultrasound for the extent and activity of newly diagnosed and relapsed Crohn’s disease (METRIC): a multicentre trial

S. Punwani, C. Mowat, R. Vega, 2019 .

Chronic diarrhoea-all in the bowel?

M. Farthing, R. Pollok, M. Farthing, 2007, Journal of the Royal Society of Medicine.

Antibody decay, T cell immunity and breakthrough infections following two SARS-CoV-2 vaccine doses in inflammatory bowel disease patients treated with infliximab and vedolizumab

Susan M. Kilroy, C. Lees, T. Ahmad, 2022, Nature Communications.

A high-dose 24-hour tranexamic acid infusion for the treatment of significant gastrointestinal bleeding: HALT-IT RCT.

I. Roberts, A. Miners, S. Stanworth, 2021, Health technology assessment.

Preoperative Steroid Use and Risk of Postoperative Complications in Patients With Inflammatory Bowel Disease Undergoing Abdominal Surgery

S. Saxena, R. Pollok, Jin-Yong Kang, 2008, The American Journal of Gastroenterology.

Small intestinal contrast ultrasonography for the detection of small bowel complications in Crohn's disease: Correlation with intraoperative findings and magnetic resonance enterography

R. Pollok, J. Pilcher, Shankar Kumar, 2015, Journal of gastroenterology and hepatology.

Acute mesenteric infarction: an important cause of abdominal pain in ulcerative colitis.

D. Rampton, P. Irving, R. Pollok, 2005, European journal of gastroenterology & hepatology.

Withdrawal of infliximab or concomitant immunosuppressant therapy in patients with Crohn's disease on combination therapy (SPARE): a multicentre, open-label, randomised controlled trial

M. Parkes, J. Satsangi, Fraser Cummings, 2023, The lancet. Gastroenterology & hepatology.

Magnetic resonance enterography compared with ultrasonography in newly diagnosed and relapsing Crohn's disease patients: the METRIC diagnostic accuracy study.

S. Travis, A. Hart, S. Halligan, 2019, Health technology assessment.

Diagnostic imaging and radiation exposure in inflammatory bowel disease.

R. Pollok, N. Zakeri, 2016, World journal of gastroenterology.

Temporal trends in imaging and associated radiation exposure in inflammatory bowel disease

A. Poullis, R. Pollok, S. Chatu, 2013, International journal of clinical practice.

Acute upper gastrointestinal bleeding: identifying low risk patients

R. Pollok, C. Groves, G. Chakrabarty, 2011, Gut.

Diagnosis and outcome of Clostridium difficile infection by toxin enzyme immunoassay and polymerase chain reaction in an island population

T. Planche, R. Pollok, Shankar Kumar, 2016, Journal of gastroenterology and hepatology.

Increased health burden associated with Clostridium difficile diarrhoea in inflammatory bowel disease: authors’ reply

R. Pollok, M. Jen, S. Saxena, 2011 .

Investigation of chronic diarrhoea.

R. Pollok, 2004, Gut.

Delayed diagnosis of lymphogranuloma venereum-associated colitis in a man first suspected to have rectal cancer

R. Pollok, C. Alexakis, A. Bancil, 2016, JRSM open.

Ano-genital Granulomatosis and Crohn’s Disease: A Case Series of Males Presenting with Genital Lymphoedema

P. Mortimer, R. Pollok, K. Gordon, 2016, Journal of Crohn's & colitis.

Identification of diagnostic markers for tuberculosis by proteomic fingerprinting of serum

M. Herbster, M. Papadopoulos, S. Krishna, 2006, The Lancet.

The impact of smoking and smoking cessation on disease outcomes in ulcerative colitis: a nationwide population‐based study

A. Majeed, S. Saxena, A. Bottle, 2019, Alimentary pharmacology & therapeutics.

Letter: early use of immunomodulators and surgery in Crohn's disease

S. Saxena, R. Pollok, V. Chhaya, 2016, Alimentary pharmacology & therapeutics.

Diagnostic accuracy for the extent and activity of newly diagnosed and relapsed Crohn’s disease: a multicentre prospective comparison of magnetic resonance enterography and small bowel ultrasound –The METRIC Trial

S. Punwani, S. Travis, A. Hart, 2018 .

Response to Fujita

S. Saxena, R. Pollok, V. Subramanian, 2014, American Journal of Gastroenterology.

Letter to Editor Regarding Narula et al, IBD 2017, Budenoside Use Is a Key Quality Marker in the Management of IBD.

S. Saxena, R. Pollok, V. Chhaya, 2017, Inflammatory bowel diseases.

The Role of Thiopurines in Reducing the Need for Surgical Resection in Crohn's Disease: A Systematic Review and Meta-Analysis

S. Saxena, R. Pollok, V. Subramanian, 2014, The American Journal of Gastroenterology.

Recent Advances and Potential Multi-Omics Approaches in the Early Phases of Inflammatory Bowel Disease

U. Marigorta, R. Pollok, M. Barreiro-de Acosta, 2023, Journal of clinical medicine.

P166 Impact of consultation frequency and time to diagnosis on subsequent Inflammatory Bowel Disease outcomes

S. Saxena, A. Bottle, R. Pollok, 2021, Journal of Crohn's and Colitis.

Letter: fulminant onset complicated inflammatory bowel disease (IBD) – a unique subtype? Authors' reply

S. Saxena, R. Pollok, N. Jayasooriya, 2023, Alimentary pharmacology & therapeutics.

Meta‐analysis: diagnostic medical radiation exposure in inflammatory bowel disease

R. Pollok, V. Subramanian, S. Chatu, 2012, Alimentary pharmacology & therapeutics.

Do Probiotics prevent antibiotic associated diarrhoea? Results of a multicentre randomised placebo-controlled trial.

J. Raftery, E. Cheek, Jonathan Cohen, 2020, The Journal of hospital infection.

Interferon gamma induces enterocyte resistance against infection by the intracellular pathogen Cryptosporidium parvum.

R. Pollok, M. Farthing, M. Bajaj‐Elliott, 2001, Gastroenterology.

Colonoscopy in patients with inflammatory bowel disease: self-reported experience, understanding, anxieties and tolerance of the procedure

A. Poullis, L. Medcalf, P. Neild, 2015 .

Primary cytomegalovirus infectious colitis complicating Crohn's disease successfully treated with oral valganciclovir.

T. Harrison, R. Pollok, V. Subramanian, 2010, Journal of Crohn's & colitis.

The role of Cryptosporidium parvum-derived phospholipase in intestinal epithelial cell invasion

R. Pollok, M. Farthing, V. Mcdonald, 2003, Parasitology Research.

European evidence-based Consensus on the prevention, diagnosis and management of opportunistic infections in inflammatory bowel disease.

H. Tilg, A. Kaser, A. Moschen, 2009, Journal of Crohn's & colitis.

Opioid use and associated factors in 1676 patients with inflammatory bowel disease: a multicentre quality improvement project

Waleed S. Beshyah, C. Lamb, N. Kennedy, 2023, Frontline Gastroenterology.

Diagnostic accuracy of magnetic resonance enterography and small bowel ultrasound for the extent and activity of newly diagnosed and relapsed Crohn's disease (METRIC): a multicentre trial

S. Punwani, C. Mowat, R. Vega, 2018, The Lancet Gastroenterology and Hepatology.

P99 Routine imaging of Crohn’s disease with ultrasound and MR enterography: the patient perspective

R. Pollok, Jaymin H. Patel, G. Nandra, 2021, Posters.