Wai K. Leung

25.2k total citations · 5 hit papers
387 papers, 16.5k citations indexed

About

Wai K. Leung is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Wai K. Leung has authored 387 papers receiving a total of 16.5k indexed citations (citations by other indexed papers that have themselves been cited), including 172 papers in Surgery, 114 papers in Pulmonary and Respiratory Medicine and 73 papers in Oncology. Recurrent topics in Wai K. Leung's work include Helicobacter pylori-related gastroenterology studies (137 papers), Gastric Cancer Management and Outcomes (99 papers) and Colorectal Cancer Screening and Detection (50 papers). Wai K. Leung is often cited by papers focused on Helicobacter pylori-related gastroenterology studies (137 papers), Gastric Cancer Management and Outcomes (99 papers) and Colorectal Cancer Screening and Detection (50 papers). Wai K. Leung collaborates with scholars based in Hong Kong, China and United States. Wai K. Leung's co-authors include Joseph J.�Y. Sung, Francis K.L. Chan, Ka‐Fai To, Enders K. Ng, Ka Shing Cheung, James Lau, Henry Lik‐Yuen Chan, Esther W. Chan, Ian Chi Kei Wong and KL Goh and has published in prestigious journals such as New England Journal of Medicine, The Lancet and Journal of Biological Chemistry.

In The Last Decade

Wai K. Leung

369 papers receiving 16.0k citations

Hit Papers

5 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Screening for gastric cancer in Asia: current evidence and practice

2008 684 citations Wai K. Leung, Enders K. Ng et al. profile →
Increasing incidence of colorectal cancer in Asia: implications for screening

2005 649 citations Joseph J.�Y. Sung, Wai K. Leung et al. profile →
Long-term proton pump inhibitors and risk of gastric cancer development after treatment for Helicobacter pylori : a population-based study

2017 313 citations Ka Shing Cheung, Esther W. Chan et al. Gut profile →
Global prevalence of Helicobacter pylori infection between 1980 and 2022: a systematic review and meta-analysis

2023 240 citations Yunhao Li, Wai K. Leung et al. profile →
RE.GA.IN.: the Real-world Gastritis Initiative–updating the updates

2024 43 citations Peter Malfertheiner, Wai K. Leung et al. Gut profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Wai K. Leung Hong Kong	67	7.4k	4.4k	3.3k	3.2k	3.0k	387	16.5k
Nayoung Kim South Korea	63	10.1k 1.4×	4.9k 1.1×	4.7k 1.4×	3.7k 1.1×	1.9k 0.6×	840	19.9k
Ming‐Shiang Wu Taiwan	70	9.4k 1.3×	5.5k 1.3×	4.0k 1.2×	2.8k 0.9×	4.5k 1.5×	596	20.0k
Siddharth Singh United States	72	6.2k 0.8×	2.2k 0.5×	2.0k 0.6×	1.6k 0.5×	1.9k 0.7×	412	20.9k
James E. Everhart United States	81	7.9k 1.1×	2.6k 0.6×	1.6k 0.5×	2.7k 0.8×	1.8k 0.6×	171	23.0k
Julián Panés Spain	84	8.5k 1.2×	1.2k 0.3×	2.8k 0.8×	1.8k 0.5×	2.7k 0.9×	590	26.0k
Andrew T. Chan United States	87	4.8k 0.7×	3.7k 0.8×	7.6k 2.3×	1.4k 0.4×	9.4k 3.2×	610	31.0k
Don C. Rockey United States	72	6.0k 0.8×	2.4k 0.6×	2.7k 0.8×	1.8k 0.6×	2.5k 0.9×	462	20.0k
Ángel Lanas Spain	58	6.3k 0.9×	2.1k 0.5×	1.5k 0.5×	3.4k 1.0×	1.6k 0.5×	366	15.4k
Loren Laine United States	81	11.8k 1.6×	4.6k 1.1×	1.4k 0.4×	8.2k 2.5×	2.5k 0.8×	350	23.5k
Grace Lai–Hung Wong Hong Kong	90	4.1k 0.6×	1.5k 0.3×	2.4k 0.7×	1.0k 0.3×	1.8k 0.6×	556	27.2k

Countries citing papers authored by Wai K. Leung

Since Specialization

Citations

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

Fields of papers citing papers by Wai K. Leung

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Wai K. Leung. 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 Wai K. Leung. The network helps show where Wai K. Leung may publish in the future.

Co-authorship network of co-authors of Wai K. Leung

This figure shows the co-authorship network connecting the top 25 collaborators of Wai K. Leung. A scholar is included among the top collaborators of Wai K. Leung based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Wai K. Leung. Wai K. Leung is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Mao, Xianhua, Ka Shing Cheung, Lung‐Yi Mak, et al.. (2025). Risk of colorectal cancer and cancer‐related mortality in type 2 diabetes patients treated with metformin, SGLT‐2 inhibitors, or their combination. Cancer Communications. 45(7). 880–883.

Zhang, Lina, et al.. (2025). Gut Microbiota Predicts Treatment Response to Empagliflozin Among MASLD Patients Without Diabetes Mellitus. Liver International. 45(3). e70023–e70023. 6 indexed citations

Cheung, Ka Shing, Vincent Ka Chun Yan, Xuxiao Ye, et al.. (2024). Proton pump inhibitors associated with severe COVID‐19 among two‐dose but not three‐dose vaccine recipients. Journal of Gastroenterology and Hepatology. 39(9). 1837–1846.

Li, Yunhao, et al.. (2024). Temporal Trend of Incidence and Prevalence of Eosinophilic Esophagitis in Asia: A Systematic Review and Meta-Analysis. The American Journal of Gastroenterology. 120(2). 320–331. 2 indexed citations

Cheung, Ka Shing, Lung‐Yi Mak, Chi‐Ho Lee, et al.. (2024). Glycaemic control is a modifiable risk factor for hepatocellular carcinoma and liver‐related mortality in patients with diabetes. Alimentary Pharmacology & Therapeutics. 60(10). 1398–1408. 6 indexed citations

Cheung, Ka Shing, Lung‐Yi Mak, Chi‐Ho Lee, et al.. (2024). Optimal glycaemic control and the reduced risk of colorectal adenoma and cancer in patients with diabetes: a population-based cohort study. Gut. 73(8). 1313–1320. 5 indexed citations

Guo, Chuan‐Guo, et al.. (2024). Real-world efficacy of second-line therapies for Helicobacter pylori: a population-based study. Journal of Antimicrobial Chemotherapy. 79(9). 2263–2272.

Lyu, Tao, Ka Shing Cheung, Ni Li, et al.. (2023). Whole genome sequencing reveals novel genetic mutations of Helicobacter pylori associating with resistance to clarithromycin and levofloxacin. Helicobacter. 28(4). e12972–e12972. 5 indexed citations

Leung, Wai K., et al.. (2023). Association between Gut Microbiota and SARS-CoV-2 Infection and Vaccine Immunogenicity. Microorganisms. 11(2). 452–452. 19 indexed citations

10.

Guo, Chuan‐Guo, Feifei Zhang, Joseph T. Wu, et al.. (2021). Divergent trends of hospitalizations for upper and lower gastrointestinal bleeding based on population prescriptions of aspirin, proton pump inhibitors and Helicobacter pylori eradication therapy. United European Gastroenterology Journal. 9(5). 543–551. 11 indexed citations

11.

Guo, Chuan‐Guo, Linwei Tian, Feifei Zhang, Ka Shing Cheung, & Wai K. Leung. (2021). Associations of seasonal variations and meteorological parameters with incidences of upper and lower gastrointestinal bleeding. Journal of Gastroenterology and Hepatology. 36(12). 3354–3362. 2 indexed citations

12.

Cheung, Ka Shing, Lijia Chen, Esther W. Chan, et al.. (2020). Nonsteroidal anti‐inflammatory drugs but not aspirin are associated with a lower risk of post‐colonoscopy colorectal cancer. Alimentary Pharmacology & Therapeutics. 51(9). 899–908. 19 indexed citations

13.

Guo, Chuan‐Guo, Lijia Chen, Esther W. Chan, et al.. (2018). Systematic review with meta‐analysis: the risk of gastrointestinal bleeding in patients taking third‐generation P2Y₁₂ inhibitors compared with clopidogrel. Alimentary Pharmacology & Therapeutics. 49(1). 7–19. 11 indexed citations

14.

Tan, Victoria P., et al.. (2017). Randomised clinical trial: rifaximin versus placebo for the treatment of functional dyspepsia. Alimentary Pharmacology & Therapeutics. 45(6). 767–776. 103 indexed citations

15.

Cheung, Ka Shing & Wai K. Leung. (2017). Gastrointestinal bleeding in patients on novel oral anticoagulants: Risk, prevention and management. World Journal of Gastroenterology. 23(11). 1954–1954. 141 indexed citations

16.

Yan, Helen H.N., Siu Lun Ho, Wai K. Leung, et al.. (2016). RNF43 germline and somatic mutation in serrated neoplasia pathway and its association with BRAF mutation. Gut. 66(9). 1645–1656. 138 indexed citations

17.

Sangodkar, Jaya, Analisa DiFeo, Rachel Schwartz, et al.. (2008). Functional role of the KLF6 tumour suppressor gene in gastric cancer. European Journal of Cancer. 45(4). 666–676. 47 indexed citations

18.

Chow, Dorothy K., Rupert W. Leong, Larry H. Lai, et al.. (2007). Changes in Crohnʼs disease phenotype over time in the Chinese population: Validation of the Montreal classification system. Inflammatory Bowel Diseases. 14(4). 536–541. 58 indexed citations

19.

Leung, Wai K.. (2005). Effect of oral erythromycin on gastric and small bowel transit time of capsule endoscopy. World Journal of Gastroenterology. 11(31). 4865–4865. 60 indexed citations

20.

Leung, Wai K., Jun Yu, Francis K.L. Chan, et al.. (2002). Expression of trefoil peptides (TFF1, TFF2, and TFF3) in gastric carcinomas, intestinal metaplasia, and non‐neoplastic gastric tissues. The Journal of Pathology. 197(5). 582–588. 93 indexed citations

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.

Explore authors with similar magnitude of impact