John Ryan

3.4k total citations
77 papers, 1.6k citations indexed

About

John Ryan is a scholar working on Epidemiology, Hematology and Hepatology. According to data from OpenAlex, John Ryan has authored 77 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 29 papers in Epidemiology, 15 papers in Hematology and 15 papers in Hepatology. Recurrent topics in John Ryan's work include Liver Disease Diagnosis and Treatment (20 papers), Iron Metabolism and Disorders (12 papers) and Trace Elements in Health (8 papers). John Ryan is often cited by papers focused on Liver Disease Diagnosis and Treatment (20 papers), Iron Metabolism and Disorders (12 papers) and Trace Elements in Health (8 papers). John Ryan collaborates with scholars based in Ireland, United States and United Kingdom. John Ryan's co-authors include John R. Goellner, J. Aidan Carney, Michael Pavlides, Emmanuel Tsochatzis, Pathik Parikh, Ahmad Moolla, John Crowe, Matthew W. Lawless, Paul C. Adams and Jeremy Cobbold and has published in prestigious journals such as The Lancet, Environmental Science & Technology and The Journal of Immunology.

In The Last Decade

John Ryan

72 papers receiving 1.5k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
John Ryan Ireland	23	592	349	268	233	228	77	1.6k
Jun‐ichi Kawada Japan	28	781 1.3×	55 0.2×	87 0.3×	163 0.7×	491 2.2×	141	2.3k
Qian Zhu China	24	247 0.4×	163 0.5×	59 0.2×	63 0.3×	632 2.8×	148	1.9k
Paul Hengster Austria	19	237 0.4×	89 0.3×	79 0.3×	91 0.4×	377 1.7×	77	1.4k
Antonio Angeloni Italy	28	692 1.2×	57 0.2×	149 0.6×	31 0.1×	541 2.4×	149	2.2k
Sukanta Das India	18	372 0.6×	208 0.6×	94 0.4×	38 0.2×	310 1.4×	64	1.2k
Yoshinari Matsumoto Japan	25	510 0.9×	108 0.3×	33 0.1×	56 0.2×	459 2.0×	138	1.9k
Yanhong Wang China	22	586 1.0×	102 0.3×	84 0.3×	17 0.1×	352 1.5×	96	1.8k
Asmaa M. Zahran Egypt	20	131 0.2×	54 0.2×	69 0.3×	212 0.9×	288 1.3×	129	1.3k
Gareth W. Jones United Kingdom	32	372 0.6×	34 0.1×	83 0.3×	107 0.5×	733 3.2×	67	3.4k
M Gillet Switzerland	30	395 0.7×	371 1.1×	70 0.3×	95 0.4×	349 1.5×	145	2.9k

Countries citing papers authored by John Ryan

Since Specialization

Citations

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

Fields of papers citing papers by John Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of John Ryan. A scholar is included among the top collaborators of John Ryan 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 John Ryan. John Ryan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ryan, John, et al.. (2025). Multimodality imaging findings in secondary dysmenorrhea. Clinical Radiology. 86. 106927–106927.

Shoemaker, Ritchie C., et al.. (2024). A Transcriptomic Fingerprint for Parkinson's Disease Found in Patients with Chronic Inflammatory Response Syndrome: Implications for Diagnosis, Treatment and Prevention. Medical Research Archives. 12(9).

Shanahan, William, Aoife Canney, Neil G. Docherty, et al.. (2023). Tumour stemness and poor clinical outcomes in haemochromatosis patients with hepatocellular carcinoma. Journal of Clinical Pathology. 77(10). 669–675. 4 indexed citations

Angus, Colin, et al.. (2023). Impact of minimum unit pricing on alcohol-related hospital outcomes: systematic review. BMJ Open. 13(2). e065220–e065220. 23 indexed citations

Ryan, John, et al.. (2023). BI31 Hereditary haemochromatosis: a risk factor for nonmelanoma skin cancer?. British Journal of Dermatology. 188(Supplement_4). 1 indexed citations

Shanahan, William, et al.. (2023). Xanthoma striatum palmare: Getting a handle on hyperlipidaemia in primary biliary cholangitis.. Clinics and Research in Hepatology and Gastroenterology. 48(1). 102255–102255. 2 indexed citations

Papatheodoridi, Μargarita, Guruprasad P. Aithal, Hong Kai Lim, et al.. (2023). Health-related Quality of Life in Patients With Nonalcoholic Fatty Liver Disease: A Prospective Multi-center UK Study. Clinical Gastroenterology and Hepatology. 21(12). 3107–3114.e3. 13 indexed citations

Zoller, Heinz, Benedikt Schaefer, Annick Vanclooster, et al.. (2022). EASL Clinical Practice Guidelines on haemochromatosis. Journal of Hepatology. 77(2). 479–502. 76 indexed citations

Benmassaoud, Amine, Davide Roccarina, Marta Cilla, et al.. (2022). Sex is a major effect modifier between body composition and mortality in patients with cirrhosis assessed for liver transplantation. Liver International. 43(1). 160–169. 11 indexed citations

10.

Wallen, Matthew P., et al.. (2021). Evaluation of techniques used to assess skeletal muscle quantity in patients with cirrhosis. Clinical Nutrition ESPEN. 44. 287–296. 16 indexed citations

11.

Wallen, Matthew P., John Ryan, Adrian Hall, et al.. (2020). Is post-transplant metabolic syndrome associated with pre-liver transplant visceral adipose tissue area?. Clinical Nutrition ESPEN. 39. 61–66. 3 indexed citations

12.

Boland, Karen, Narayan Ramamurthy, Alireza Morovat, et al.. (2020). Systemic iron reduction by venesection alters the gut microbiome in patients with haemochromatosis. JHEP Reports. 2(6). 100154–100154. 9 indexed citations

13.

Marjot, Thomas, Jane Collier, & John Ryan. (2016). What is HFE haemochromatosis?. British Journal of Hospital Medicine. 77(6). C91–C95. 3 indexed citations

14.

Galvin, Zita, et al.. (2015). Blood alanine aminotransferase levels >1,000 IU/l – causes and outcomes. Clinical Medicine. 15(3). 244–247. 30 indexed citations

15.

Ryan, John, et al.. (2012). Independent evaluation of the ASDAN islam and citizenship short course. UWE Research Repository (UWE Bristol). 7(5). 359–64. 1 indexed citations

16.

Ryan, John, et al.. (2012). Pegylated interferon-α induced hypoferremia is associated with the immediate response to treatment in hepatitis C. Hepatology. 56(2). 492–500. 41 indexed citations

17.

Harty, L. C., David Lai, Anthony Dunne, et al.. (2011). Prevalence and Progress of Joint Symptoms in Hereditary Hemochromatosis and Symptomatic Response to Venesection. JCR Journal of Clinical Rheumatology. 17(4). 220–222. 9 indexed citations

18.

Ryan, John, et al.. (2010). TGFb1 Suppresses the Mast Cell Response In Vitro and In Vivo (86.6). The Journal of Immunology. 184(Supplement_1). 86.6–86.6. 2 indexed citations

19.

Maree, Andrew, Ciara Vangjeli, Hani Jneid, et al.. (2010). G-protein β3 subunit polymorphism and bleeding in the orbofiban in patients with unstable coronary syndromes–thrombolysis in myocardial infarction 16 trial. Journal of Thrombosis and Haemostasis. 8(5). 934–941. 5 indexed citations

20.

Mitchell, Clint, Peyman Kabolizadeh, John Ryan, et al.. (2007). Low-Dose BBR3610 Toxicity in Colon Cancer Cells Is p53-Independent and Enhanced by Inhibition of Epidermal Growth Factor Receptor (ERBB1)-Phosphatidyl Inositol 3 Kinase Signaling. Molecular Pharmacology. 72(3). 704–714. 25 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.

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