A. Walan

4.3k citations

107 papers · 3.3k indexed · h-index 28

Impact in

Gastroenterology top 0.1%
- Gastroesophageal reflux and treatments
- Gastrointestinal motility and disorders
Surgery top 1%
- Helicobacter pylori-related gastroenterology studies
- Eosinophilic Esophagitis
- Esophageal and GI Pathology

Papers in ⓘ

Gastroenterology 46
- Gastroesophageal reflux and treatments 35
- Gastrointestinal motility and disorders 6
- Celiac Disease Research and Management 6
Surgery 58
- Helicobacter pylori-related gastroenterology studies 50
- Eosinophilic Esophagitis 16

Co-authors: G. Bodemar (31 shared papers)G. Dotevall (19 shared papers)B. Norlander (12 shared papers)J. Næsdal (10 shared papers)Niilo Havu (4 shared papers)Elly C. Klinkenberg–Knol (4 shared papers)P. Snel (3 shared papers)R. Gotthard (11 shared papers)
Journals: Scandinavian Journal of Gastroenterology (37 papers)Gastroenterology (7 papers)British Journal of Clinical Pharmacology (6 papers)The Lancet (4 papers)Gut (3 papers)
Partner nations: Sweden Norway Canada

In The Last Decade

A. Walan

101 papers receiving 2.9k citations

Peers

Countries citing papers authored by A. Walan

Since Specialization

Citations

This map shows the geographic impact of A. Walan'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. Walan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. Walan more than expected).

Fields of papers citing papers by A. Walan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. Walan. 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. Walan. The network helps show where A. Walan may publish in the future.

Co-authors

The 25 scholars most cited alongside A. Walan, 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. Walan Line = papers co-authored together A. Walan links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 107 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Long-term omeprazole treatment in resistant gastroesophageal reflux disease: Efficacy, safety, and influence on gastric mucosa Gastroenterology ·Elly C. Klinkenberg–Knol, Frits Nelis, John Dent, P. Snel, Brent Mitchell, Peter J Prichard, David Lloyd, Niilo Havu, Madeline H. Frame, Jonas Romàn, A. Walan	2000	402
2	Effect of Omeprazole and Ranitidine on Ulcer Healing and Relapse Rates in Patients with Benign Gastric Ulcer New England Journal of Medicine ·A. Walan, John P. Bader, M. Claßen, C B Lamers, D. W. Piper, K. Rutgersson, S. Eriksson	1989	294
3	Cure of Helicobacter pylori infection in patients with reflux oesophagitis treated with long term omeprazole reverses gastritis without exacerbation of reflux disease: results of a randomised controlled trial Gut ·Ernst J. Kuipers, G.F. Nelis, Elly C. Klinkenberg–Knol, P. Snel, D Goldfain, J. J. Kolkman, H P M Festen, John Dent, P Zeitoun, Niilo Havu, Martha Lamm, A. Walan	2003	157
4	CIMETIDINE IN THE TREATMENT OF ACTIVE DUODENAL AND PREPYLORIC ULCERS The Lancet ·G. Bodemar, A. Walan	1976	135
5	MAINTENANCE TREATMENT OF RECURRENT PEPTIC ULCER BY CIMETIDINE The Lancet ·G. Bodemar, A. Walan	1978	130
6	A Comparison of Two Different Doses of Omeprazole Versus Ranitidine in Treatment of Duodenal Ulcers Journal of Clinical Gastroenterology ·K. D. Bardhan, G. Bianchi Porro, K. Bose, M. J. Daly, R F Hinchliffe, E. Jönsson, M. Lazzaroni, J. Næsdal, Leif Rikner, A. Walan	1986	127
7	Seven-year follow-up of a randomized clinical trial comparing proton-pump inhibition with surgical therapy for reflux oesophagitis British journal of surgery ·Lars Lundell, Pekka Miettinen, H. E. Myrvold, Jan Gunnar Hatlebakk, L. Wallin, Anna Malm, Ian Sutherland, A. Walan	2007	125
8	Comparison of Outcomes Twelve Years After Antireflux Surgery or Omeprazole Maintenance Therapy for Reflux Esophagitis Clinical Gastroenterology and Hepatology ·Lars Lundell, Pekka Miettinen, H. E. Myrvold, Jan Gunnar Hatlebakk, L. Wallin, Cecilia Engström, Risto Julkunen, Madeline C. Montgomery, Anders Malm, Tore Lind, A. Walan	2009	114
9	Pharmacokinetics and effect on caffeine metabolism of the proton pump inhibitors, omeprazole, lansoprazole, and pantoprazole British Journal of Clinical Pharmacology ·Tommy Andersson, Johan Holmberg, Kerstin Röhss, A. Walan	1998	101
10	Changing Patterns of Helicobacter pylori Gastritis in Long‐Standing Acid Suppression Helicobacter ·Paul Moayyedi, C Wason, Robert Peacock, A. Walan, Karna Dev Bardhan, Anthony Axon, Michael F. Dixon	2000	86
11	The absorption of cimetidine before and during maintenance treatment with cimetidine and the influence of a meal on the absorption of cimetidine‐studies in patients with peptic ulcer disease. British Journal of Clinical Pharmacology ·G. Bodemar, B. Norlander, Lina Fransson, A. Walan	1979	72
12	Changes of gastric mucosal architecture during long‐term omeprazole therapy: results of a randomized clinical trial Alimentary Pharmacology & Therapeutics ·Lars Lundell, Niilo Havu, Pekka Miettinen, H. E. Myrvold, L. Wallin, Risto Julkunen, Kristina Levander, Jan Gunnar Hatlebakk, Bengt Liedman, Martha Lamm, Anna Malm, A. Walan, (unknown)	2006	71
13	The clinical effect of salazosulphapyridine (Salazopyrin r) in Crohn's disease. A controlled double-blind study. PubMed ·P Anthonisen, F Bárány, O Folkenborg, Aliza Holtz, S. Jarnum, M Kristensen, P Riis, A. Walan, H. Worning	1974	63
14	Effect of Omeprazole, a Substituted Benzimidazole, on 24-H Intragastric Acidity in Patients with Peptic Ulcer Disease Scandinavian Journal of Gastroenterology ·J. Næsdal, G. Bodemar, A. Walan	1984	63
15	Guidelines for clinical trials in Helicobacter pylori infection Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) ·Anthony Axon, M. Deltenre, Sven Eriksson, Roberto Fiocca, Y. Glupczynski, Alexander A.M. Hirschl, Richard H. Hunt, Ken Kimura, Robert Logan, Peter Malfertheiner, Françis Mégraud, Colm O’Morain, José María Pajares García, E RAUWS, S. J. Rune, Takashi Shimoyama, Peter Unge, A. Walan, T. Ulf Westblom	1997	62
16	Maintenance Treatment with Cimetidine in Peptic Ulcer Disease for Up to 4 Years Scandinavian Journal of Gastroenterology ·A. Walan, Gabriele Bianchi-Porro, E Hentschel, Karna Dev Bardhan, ML DeLattre	1987	59
17	The Clinical Effect of Salazosulphapyridine (Salazopyrin^R) in Crohn’s Disease Scandinavian Journal of Gastroenterology ·P Anthonisen, F Bárány, O Folkenborg, Aliza Holtz, S. Jarnum, Marie Kristensen, P Riis, A. Walan, H. Worning	1974	58
18	Pharmacokinetics of Cimetidine after Single Doses and during Continuous Treatment Clinical Pharmacokinetics ·G. Bodemar, B. Norlander, A. Walan	1981	54
19	Pharmacokinetics of [14C] omeprazole in patients with impaired renal function Clinical Pharmacology & Therapeutics ·J. Næsdal, Tommy Andersson, G. Bodemar, Rutger Larsson, Carl‐Gunnar Regårdh, Inger Skånberg, A. Walan	1986	52
20	Pathophysiological effects of long-term acid suppression in man Digestive Diseases and Sciences ·R F McCloy, R. Arnold, K. D. Bardhan, D Cattan, Elly C. Klinkenberg–Knol, Paul N. Maton, Robert H. Riddell, P. Sipponen, A. Walan	1995	47

About A. Walan

A. Walan is a scholar working on Gastroenterology, Surgery, Nutrition and Dietetics, Pharmacology and Nephrology, having authored 107 papers that have together received 3.3k indexed citations. Recurring topics across this work include Helicobacter pylori-related gastroenterology studies (50 papers), Gastroesophageal reflux and treatments (35 papers), Eosinophilic Esophagitis (16 papers), Potassium and Related Disorders (7 papers), Antibiotics Pharmacokinetics and Efficacy (7 papers), Gastrointestinal motility and disorders (6 papers), Celiac Disease Research and Management (6 papers) and Clinical Nutrition and Gastroenterology (6 papers). The work is most often cited by research in Gastroenterology (1.8k citations), Surgery (2.2k citations), Pharmacology (232 citations), Pharmacology (353 citations) and Pulmonary and Respiratory Medicine (612 citations). A. Walan has collaborated with scholars based in Sweden, Norway and Canada. Frequent co-authors include G. Bodemar, G. Dotevall, B. Norlander, J. Næsdal, Niilo Havu, Elly C. Klinkenberg–Knol, P. Snel, R. Gotthard, S. Eriksson and Claes Hallert. Their work appears in journals such as Scandinavian Journal of Gastroenterology, Gastroenterology, British Journal of Clinical Pharmacology, The Lancet and Gut.

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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