World's Best Scientists 2026 revealed!

D-Index & Metrics

Medicine

D-Index
136
Citations
73616
World Ranking
1969
National Ranking
13

Francis K.L. Chan publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Francis K.L. Chan sits on this spectrum.

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 611 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 786 publications — 86th percentile

86% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Francis K.L. Chan D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where Francis K.L. Chan sits on this spectrum.

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 400 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 136 D-Index — 90th percentile

90% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

Francis K.L. Chan is affiliated with the Chinese University of Hong Kong in China and has made significant contributions to the fields of Medicine and Biochemistry, Genetics and Molecular Biology through a substantial body of work.

Their research primarily focuses on several specialized subfields including Molecular Biology, Infectious Diseases, Gastroenterology, Surgery, and Pulmonary and Respiratory Medicine. The main topics explored in their publications cover:

  • Gut microbiota and health
  • Clostridium difficile and Clostridium perfringens research
  • Diet and metabolism studies
  • Gastric Cancer Management and Outcomes
  • COVID-19 Clinical Research Studies
  • Gastrointestinal Bleeding Diagnosis and Treatment
  • Long-Term Effects of COVID-19

Chan's recent papers reflect a concentration on gut microbiota and COVID-19, including:

  • Alterations in Gut Microbiota of Patients With COVID-19 During Time of Hospitalization (2020, Gastroenterology)
  • Gut microbiota composition reflects disease severity and dysfunctional immune responses in patients with COVID-19 (2021, Gut)
  • Gut microbiota dynamics in a prospective cohort of patients with post-acute COVID-19 syndrome (2022, Gut)
  • Depicting SARS-CoV-2 faecal viral activity in association with gut microbiota composition in patients with COVID-19 (2020, Gut)
  • Screening and eradication of Helicobacter pylori for gastric cancer prevention: the Taipei global consensus (2020, Gut)

Their frequent co-authors include researchers such as Siew C. Ng, Joyce Wing Yan Mak, Paul K.S. Chan, Chun Pan Cheung, and Hein M. Tun, suggesting collaborative efforts in overlapping research areas.

Publications by Francis K.L. Chan appear predominantly in highly specialized venues, with the most frequent being:

  • Gastroenterology
  • Gut
  • Gut Microbes
  • Digestive Endoscopy
  • Digestion

Best Publications

  • Worldwide incidence and prevalence of inflammatory bowel disease in the 21st century: a systematic review of population-based studies

    Siew C Ng;Hai Yun Shi;Hai Yun Shi;Nima Hamidi;Fox E Underwood

  • Global Prevalence of Helicobacter pylori Infection: Systematic Review and Meta-Analysis

    James K.Y. Hooi;Wan Ying Lai;Wee Khoon Ng;Wee Khoon Ng;Michael M.Y. Suen

  • Alterations in Gut Microbiota of Patients With COVID-19 During Time of Hospitalization.

    Tao Zuo;Fen Zhang;Grace C.Y. Lui;Yun Kit Yeoh

  • Peptic ulcer disease

    Peter Malfertheiner;Francis K L Chan;Kenneth E L McColl

  • Rome IV - Gastroduodenal Disorders.

    Stanghellini;Talley Nj;Chan F;Hasler Wl

  • Gut microbiota composition reflects disease severity and dysfunctional immune responses in patients with COVID-19.

    Yun Kit Yeoh;Tao Zuo;Grace Chung Yan Lui;Fen Zhang

  • Metagenomic analysis of faecal microbiome as a tool towards targeted non-invasive biomarkers for colorectal cancer

    Jun Yu;Qiang Feng;Sunny Hei Wong;Dongya Zhang

  • Guidelines for prevention of NSAID-related ulcer complications

    Frank L Lanza;Francis K L Chan;Eamonn M M Quigley

  • Effect of intravenous omeprazole on recurrent bleeding after endoscopic treatment of bleeding peptic ulcers.

    James Y.W. Lau;Joseph J.Y. Sung;Kenneth K.C. Lee;Man Yee Yung

  • Clopidogrel versus aspirin and esomeprazole to prevent recurrent ulcer bleeding.

    Francis K L Chan;Jessica Y L Ching;Lawrence C T Hung;Vincent W S Wong

  • Preventing Recurrent Upper Gastrointestinal Bleeding in Patients With Helicobacter Pylori Infection Who Are Taking Low-Dose Aspirin or Naproxen

    Francis K.L. Chan;S.C. Sydney Chung;Bing Yee Suen;Yuk Tong Lee

  • Incidence and phenotype of inflammatory bowel disease based on results from the Asia-pacific Crohn's and colitis epidemiology study.

    Siew C. Ng;Whitney Tang;Jessica Y. Ching;May Wong

  • ACCF/ACG/AHA 2008 Expert Consensus Document on Reducing the Gastrointestinal Risks of Antiplatelet Therapy and NSAID Use: A Report of the American College of Cardiology Foundation Task Force on Clinical Expert Consensus Documents

    Deepak L. Bhatt;James Scheiman;Neena S. Abraham;Elliott M. Antman

  • Celecoxib versus diclofenac and omeprazole in reducing the risk of recurrent ulcer bleeding in patients with arthritis.

    Francis K L Chan;Lawrence C T Hung;Bing Y Suen;Justin C Y Wu

  • Endoscopic retreatment compared with surgery in patients with recurrent bleeding after initial endoscopic control of bleeding ulcers.

    James Y.W. Lau;Joseph J.Y. Sung;Yuk-hoi Lam;Angus C.W. Chan

  • Prevalence of non-alcoholic fatty liver disease and advanced fibrosis in Hong Kong Chinese: a population study using proton-magnetic resonance spectroscopy and transient elastography

    Vincent Wai-Sun Wong;Winnie Chiu-Wing Chu;Grace Lai-Hung Wong;Ruth Suk-Mei Chan

  • Randomised trial of eradication of Helicobacter pylori before non-steroidal anti-inflammatory drug therapy to prevent peptic ulcers

    Francis K L Chan;Joseph J Y Sung;S C Sydney Chung;K F To

  • Alanine aminotransferase-based algorithms of liver stiffness measurement by transient elastography (Fibroscan) for liver fibrosis in chronic hepatitis B.

    H. L.-Y. Chan;G. L.-H. Wong;P. C.-L. Choi;A. W.-H. Chan

  • Continuation of Low-Dose Aspirin Therapy in Peptic Ulcer Bleeding: A Randomized Trial

    Joseph J Y Sung;James Y W Lau;Jessica Y L Ching;Justin C Y Wu

  • Factors predicting progression of gastric intestinal metaplasia: results of a randomised trial on Helicobacter pylori eradication

    W K Leung;S-R Lin;J Y L Ching;K-F To

Frequent Co-Authors

Joseph J.Y. Sung
Joseph J.Y. Sung Nanyang Technological University
Justin C.Y. Wu
Justin C.Y. Wu Chinese University of Hong Kong
Siew C. Ng
Siew C. Ng Chinese University of Hong Kong
Jun Yu
Jun Yu Chinese University of Hong Kong
James Y.W. Lau
James Y.W. Lau Chinese University of Hong Kong
Wai K. Leung
Wai K. Leung University of Hong Kong
Vincent Wai-Sun Wong
Vincent Wai-Sun Wong Chinese University of Hong Kong
Grace Lai-Hung Wong
Grace Lai-Hung Wong Chinese University of Hong Kong
Henry Lik-Yuen Chan
Henry Lik-Yuen Chan Chinese University of Hong Kong
Paul K.S. Chan
Paul K.S. Chan Chinese University of Hong Kong

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