Subfield · Gastroenterology
Top Gastroenterology Researchers
Reza Malekzadeh ranks first, out of 4,963 ranked researchers.
Composite score: field-normalised excellence, output and total citations weighted 50 / 30 / 20, each as a percentile so no single heavy-tailed measure dominates. Floor: 15 works, and an institution the snapshot can resolve.
The ranking
- 1 Reza Malekzadeh Iran · #24 worldwide 6.7k citations · 167 works
- 2 Mark J. Daly United States · #47 worldwide 9.6k citations · 152 works
- 3 Matthew Meyerson United States · #149 worldwide 4.2k citations · 138 works
- 4 Ramnik J. Xavier United States · #345 worldwide 3k citations · 118 works
- 5 John L. Cameron United States · #658 worldwide 1.7k citations · 121 works
- 6 Timothy G. Dinan Ireland · #742 worldwide 3.1k citations · 126 works
- 7 James D. Luketich United States · #912 worldwide 1.8k citations · 137 works
- 8 Marc Ladanyi United States · #1,265 worldwide 3.1k citations · 252 works
- 9 Samuel Singer United States · #1,284 worldwide 2k citations · 100 works
- 10 Caroline Robert France · #1,339 worldwide 3.3k citations · 242 works
- 11 Alexander J. Lazar United States · #1,358 worldwide 2.3k citations · 196 works
- 12 André Franke Germany · #1,437 worldwide 2.2k citations · 117 works
- 13 Thomas C. Smyrk United States · #1,471 worldwide 1.8k citations · 114 works
- 14 Karl‐Friedrich Becker Germany · #1,472 worldwide 1.5k citations · 102 works
- 15 John F. Cryan Ireland · #1,527 worldwide 2.3k citations · 195 works
- 16 Harry Sokol France · #1,652 worldwide 1.7k citations · 97 works
- 17 Ernst J. Kuipers Netherlands · #1,777 worldwide 2k citations · 249 works
- 18 Dermot McGovern United States · #1,808 worldwide 1.8k citations · 151 works
- 19 Eamonn M.M. Quigley United States · #1,854 worldwide 1.3k citations · 121 works
- 20 Martti Färkkilâ Finland · #1,856 worldwide 1.2k citations · 104 works
- 21 Robert S. Fisher United States · #1,976 worldwide 1.3k citations · 98 works
- 22 Timothy C. Wang United States · #2,240 worldwide 2.2k citations · 187 works
- 23 Olivier Bouché France · #2,271 worldwide 1.4k citations · 103 works
- 24 Michael L. Kendrick United States · #2,350 worldwide 1.4k citations · 95 works
- 25 Murray F. Brennan United States · #2,353 worldwide 1.9k citations · 204 works
- 26 Veikko Salomaa Finland · #2,368 worldwide 3.3k citations · 239 works
- 27 Shishir K. Maithel United States · #2,622 worldwide 1.5k citations · 147 works
- 28 Christopher D.�M. Fletcher United States · #2,831 worldwide 1.1k citations · 88 works
- 29 Roberto Berni Canani Italy · #2,842 worldwide 1.3k citations · 80 works
- 30 Akram Pourshams Iran · #2,878 worldwide 3.5k citations · 67 works
- 31 Eric Van Cutsem Belgium · #2,907 worldwide 2.7k citations · 284 works
- 32 Robert G. Maki United States · #2,963 worldwide 1.2k citations · 101 works
- 33 Guillermo J. Tearney United States · #2,981 worldwide 1.1k citations · 121 works
- 34 Stefan Schreiber Germany · #3,175 worldwide 2.9k citations · 270 works
- 35 Armando Santoro Italy · #3,247 worldwide 2.4k citations · 247 works
- 36 Jaffer A. Ajani United States · #3,330 worldwide 2.4k citations · 246 works
- 37 Hein G. Gooszen Netherlands · #3,452 worldwide 1.1k citations · 71 works
- 38 Rinse K. Weersma Netherlands · #3,503 worldwide 1.9k citations · 67 works
- 39 Morton I. Grossman United States · #3,550 worldwide 846 citations · 89 works
- 40 Scott H. Sicherer United States · #3,700 worldwide 859 citations · 116 works
- 41 Stephan R. Targan United States · #3,970 worldwide 1.2k citations · 128 works
- 42 Rakesh Aggarwal India · #4,069 worldwide 1.9k citations · 63 works
- 43 John D. Rioux Canada · #4,080 worldwide 2.2k citations · 63 works
- 44 Joseph M. Connors Canada · #4,096 worldwide 1.1k citations · 90 works
- 45 Penny Whiting United Kingdom · #4,104 worldwide 13k citations · 60 works
- 46 Ailsa Hart United Kingdom · #4,259 worldwide 887 citations · 96 works
- 47 Miles Parkes United Kingdom · #5,619 worldwide 821 citations · 65 works
- 48 Valeer Desmet Belgium · #5,782 worldwide 818 citations · 69 works
- 49 Cisca Wijmenga Netherlands · #6,366 worldwide 2.1k citations · 146 works
- 50 Paul S. Meltzer United States · #6,541 worldwide 951 citations · 80 works
- 51 Alan F. Hofmann United States · #6,576 worldwide 1k citations · 64 works
- 52 Cristina R. Antonescu United States · #6,718 worldwide 865 citations · 118 works
- 53 Chandrajit P. Raut United States · #6,775 worldwide 1.4k citations · 56 works
- 54 Hashem B. El‐Serag United States · #6,889 worldwide 1.1k citations · 171 works
- 55 Joel G. Fletcher United States · #6,962 worldwide 662 citations · 87 works
- 56 Fátima Carneiro Portugal · #6,966 worldwide 996 citations · 104 works
- 57 Richard J. Harvey Australia · #7,011 worldwide 712 citations · 82 works
- 58 Ian Chau United Kingdom · #7,084 worldwide 1.1k citations · 129 works
- 59 Charles F. Code United States · #7,183 worldwide 672 citations · 66 works
- 60 Carlos A. Pellegrini United States · #7,315 worldwide 1.1k citations · 54 works
- 61 Jonathan J Deeks United Kingdom · #7,402 worldwide 1.2k citations · 106 works
- 62 Giuseppe Giaccone United States · #7,763 worldwide 1.4k citations · 160 works
- 63 Charlie W. Lees United Kingdom · #7,850 worldwide 749 citations · 60 works
- 64 Liam Murray United Kingdom · #7,911 worldwide 1.1k citations · 55 works
- 65 Charles J. Yeo United States · #7,951 worldwide 1k citations · 137 works
- 66 Peter R. Galle Germany · #8,260 worldwide 3.3k citations · 424 works
- 67 Robert D. Odze United States · #8,354 worldwide 674 citations · 60 works
- 68 George D. Demetri United States · #8,388 worldwide 674 citations · 74 works
- 69 Jerome D. Waye United States · #8,421 worldwide 630 citations · 57 works
- 70 Paul Rutgeerts Belgium · #8,422 worldwide 1.3k citations · 169 works
- 71 Jean‐Marc Dumonceau Argentina · #8,435 worldwide 926 citations · 57 works
- 72 Alan R. Zinsmeister United States · #8,827 worldwide 898 citations · 161 works
- 73 Vito Annese Italy · #9,008 worldwide 921 citations · 66 works
- 74 Jeroen Raes Belgium · #9,050 worldwide 1.5k citations · 53 works
- 75 Kei Muro Japan · #9,123 worldwide 1.1k citations · 162 works
- 76 Douglas A. Drossman United States · #9,200 worldwide 487 citations · 78 works
- 77 D. Ross Camidge United States · #9,271 worldwide 1.3k citations · 145 works
- 78 Francisco Guarner Spain · #9,445 worldwide 1.7k citations · 50 works
- 79 David Y. Graham United States · #9,632 worldwide 1.3k citations · 188 works
- 80 Madhusmita Behera United States · #9,724 worldwide 1.4k citations · 49 works
- 81 Heikki Joensuu Finland · #9,734 worldwide 1.3k citations · 135 works
- 82 William J. Sandborn United States · #9,900 worldwide 2.3k citations · 303 works
- 83 Margaret von Mehren United States · #10,083 worldwide 651 citations · 58 works
- 84 Subra Kugathasan United States · #10,206 worldwide 707 citations · 81 works
- 85 Kristian Hveem Norway · #10,452 worldwide 715 citations · 81 works
- 86 Joanne Slavin United States · #10,748 worldwide 916 citations · 80 works
- 87 Robert S. Benjamin United States · #10,971 worldwide 869 citations · 118 works
- 88 Ángel Lanas Spain · #11,127 worldwide 562 citations · 90 works
- 89 Einar S. Björnsson Iceland · #11,532 worldwide 573 citations · 72 works
- 90 Mark B. Orringer United States · #11,536 worldwide 519 citations · 64 works
- 91 Mark S. Silverberg Canada · #11,690 worldwide 682 citations · 93 works
- 92 Fergus Shanahan Ireland · #11,742 worldwide 954 citations · 127 works
- 93 Willem M. de Vos Netherlands · #11,817 worldwide 2.5k citations · 198 works
- 94 Stephen I. Katz United States · #12,055 worldwide 725 citations · 63 works
- 95 Çharles N. Bernstein Canada · #12,193 worldwide 1.4k citations · 207 works
- 96 Steve Halligan United Kingdom · #12,295 worldwide 508 citations · 77 works
- 97 Walter J. Hogan United States · #12,317 worldwide 557 citations · 52 works
- 98 Randy D. Gascoyne Canada · #12,367 worldwide 999 citations · 101 works
- 99 W. T. Cooke United Kingdom · #12,498 worldwide 532 citations · 59 works
- 100 Michael A. Kamm United Kingdom · #12,713 worldwide 824 citations · 122 works
authors from the 6,000 highest-output in Gastroenterology, re-ranked on the composite score. Author identities come from OpenAlex disambiguation and inherit its errors: a merged record can put one name over two people’s work, and a split one can halve a career. Every row links out to the OpenAlex record so the underlying claim is checkable, and anything that looks wrong can be reported from the row. That report files a correction against the bibliographic record for a human to review — it is not a removal or delisting request, and no such route exists yet.