A. M. Sawyerr

2.4k citations

36 papers · 2.0k indexed · 1 hit paper · h-index 21

Impact in

Gastroenterology top 1%
- Gastroesophageal reflux and treatments
- Gastrointestinal motility and disorders
Genetics top 5%
- Inflammatory Bowel Disease

Papers in

Gastroenterology 10
- Gastroesophageal reflux and treatments 10
Surgery 23
- Helicobacter pylori-related gastroenterology studies 13
- Eosinophilic Esophagitis 7

Co-authors: Mark Hudson R E Pounder Amar P. Dhillon A J Wakefield P M Rowles R. M. Pittilo A A M Lewis Chuka Nwokolo
Journals: Alimentary Pharmacology & Therapeutics (11 papers)Gastroenterology (5 papers)Gut (4 papers)Digestive Diseases and Sciences (4 papers)Clinical Infectious Diseases (1 paper)
Partner nations: United Kingdom United States Malta

In The Last Decade

A. M. Sawyerr

36 papers receiving 1.9k citations

Hit Papers

align trajectories log scale

PATHOGENESIS OF CROHN'S DISEASE: MULTIFOCAL GASTROINTESTINAL INFARCTION 1989 · 491 citations

Peers

Countries citing papers authored by A. M. Sawyerr

Since Specialization

Citations

This map shows the geographic impact of A. M. Sawyerr's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by A. M. Sawyerr with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. M. Sawyerr more than expected).

Fields of papers citing papers by A. M. Sawyerr

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. M. Sawyerr. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by A. M. Sawyerr. The network helps show where A. M. Sawyerr may publish in the future.

Co-authors

The 25 scholars most cited alongside A. M. Sawyerr, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with A. M. Sawyerr Line = papers co-authored together A. M. Sawyerr links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Mucosa-associated bacterial flora of the human colon Journal of Medical Microbiology ·Ian R. Poxton, Robert L. Brown, A. M. Sawyerr, A Ferguson	1997	100
2	The Mucosal Anaerobic Gram‐Negative Bacteria of the Human Colon. Clinical Infectious Diseases ·Ian R. Poxton, Robert L. Brown, A. M. Sawyerr, Anne Ferguson	1997	23
3	Morning versus evening dosing of lansoprazole 30 mg daily on twenty‐four‐hour intragastric acidity in healthy subjects Alimentary Pharmacology & Therapeutics ·A. G. Fraser, A. M. Sawyerr, Mark Hudson, M. S. H. SMITH, R E Pounder	1996	14
4	Ulcerative Colitis and Crohn's Disease: Similarities and Distinctions Journal of the Royal College of Physicians of London ·A. M. Sawyerr, Angelica Ferguson	1994	4
5	Effect of ranitidine bismuth citrate on postprandial plasma gastrin and pepsinogens. Gut ·Alan G. Fraser, Wendy Lam, Yan Luk, J. Sercombe, A. M. Sawyerr, Mark Hudson, I. Michael Samloff, R E Pounder	1993	7
6	Early mucosal changes in Crohn's disease. Gut ·E A Sankey, Amar P. Dhillon, Anthony A. Attama, A J Wakefield, Robert B. Sim, Linda More, Mark Hudson, A. M. Sawyerr, R E Pounder	1993	104
7	Short report: the effect of ranitidine on the post‐prandial absorption of a low dose of alcohol Alimentary Pharmacology & Therapeutics ·Alan G. Fraser, Mark Hudson, A. M. Sawyerr, S B Rosalki, R E Pounder	1992	28
8	Evidence for activation of coagulation in Crohn??s disease Blood Coagulation & Fibrinolysis ·Mark Hudson, R A Hutton, A J Wakefield, A. M. Sawyerr, R E Pounder	1992	67
9	Ranitidine, cimetidine, famotidine have no effect on post‐prandial absorption of ethanol 0.8 g/kg taken after an evening meal Alimentary Pharmacology & Therapeutics ·AG Fraser, M. HUDSON, A. M. Sawyerr, Michael B. Smith, S B Rosalki, R E Pounder	1992	14
10	Detection of herpesvirus DNA in the large intestine of patients with ulcerative colitis and Crohn's disease using the nested polymerase chain reaction Journal of Medical Virology ·A J Wakefield, Julie D. Fox, A. M. Sawyerr, Jill Taylor, C. H. Sweenie, Maree T. Smith, Vincent C. Emery, Mark Hudson, Richard S. Tedder, R E Pounder	1992	164
11	Rebound intragastric hyperacidity after abrupt withdrawal of histamine H2 receptor blockade. Gut ·CU Nwokolo, Jeff Smith, A. M. Sawyerr, R E Pounder	1991	52
12	The effect of histamine H2-receptor blockade on bismuth absorption from three ulcer-healing compounds Gastroenterology ·Chuka Nwokolo, Emily Prewett, A. M. Sawyerr, Mark Hudson, Roy E. Pounder	1991	24
13	Eradication of Helicobacter pylori abolishes 24‐hour hypergastrinaemia: a prospective study in healthy subjects Alimentary Pharmacology & Therapeutics ·Emily Prewett, Jeff Smith, Chuka Nwokolo, Mark Hudson, A. M. Sawyerr, R E Pounder	1991	62
14	The effect of ranitidine, cimetidine or famotidine on low‐dose post‐prandial alcohol absorption Alimentary Pharmacology & Therapeutics ·Alan G. Fraser, Emily Prewett, Mark Hudson, A. M. Sawyerr, S B Rosalki, R E Pounder	1991	27
15	Nocturnal intragastric acidity during and after a period of dosing with either ranitidine or omeprazole Gastroenterology ·Emily Prewett, Mark Hudson, Chuka Nwokolo, A. M. Sawyerr, Roy E. Pounder	1991	49
16	Smoking, the oral contraceptive pill, and Crohn's disease Digestive Diseases and Sciences ·A J Wakefield, A. M. Sawyerr, Mark Hudson, Amar P. Dhillon, R E Pounder	1991	52
17	Severe hepatitis caused by cyproterone acetate. Gut ·J Blake, A. M. Sawyerr, James Dooley, P. J. Scheuer, Neil McIntyre	1990	27
18	Tolerance during 29 days of conventional dosing with cimetidine, nizatidine, famotidine or ranitidine Alimentary Pharmacology & Therapeutics ·Chuka Nwokolo, Jeff Smith, C. J. Gavey, A. M. Sawyerr, R E Pounder	1990	125
19	Granulomatous gastritis associated with Campylobacter pylori Apmis ·A.P. Dhillon, A. M. Sawyerr	1989	24
20	PATHOGENESIS OF CROHN'S DISEASE: MULTIFOCAL GASTROINTESTINAL INFARCTION The Lancet ·A J Wakefield, Amar P. Dhillon, P M Rowles, A. M. Sawyerr, R. M. Pittilo, A A M Lewis, R E Pounder Hit paper breakdown →	1989	491

About A. M. Sawyerr

A. M. Sawyerr is a scholar working on Gastroenterology, Surgery, Genetics, Pharmacology and Toxicology, having authored 36 papers that have together received 2.0k indexed citations. Recurring topics across this work include Helicobacter pylori-related gastroenterology studies (13 papers), Inflammatory Bowel Disease (11 papers), Gastroesophageal reflux and treatments (10 papers), Eosinophilic Esophagitis (7 papers), Autoimmune and Inflammatory Disorders (5 papers), Alcohol Consumption and Health Effects (4 papers), Microscopic Colitis (4 papers) and Gastric Cancer Management and Outcomes (4 papers). The work is most often cited by research in Gastroenterology (388 citations), Genetics (676 citations), Surgery (817 citations), Epidemiology (621 citations) and Hematology (157 citations). A. M. Sawyerr has collaborated with scholars based in United Kingdom, United States and Malta. Frequent co-authors include Mark Hudson, R E Pounder, Amar P. Dhillon, A J Wakefield, P M Rowles, R. M. Pittilo, R E Pounder, A A M Lewis, Chuka Nwokolo and Jeff Smith. Their work appears in journals such as Alimentary Pharmacology & Therapeutics, Gastroenterology, Gut, Digestive Diseases and Sciences and Clinical Infectious Diseases.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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