John P. Ryan

2.4k total citations
105 papers, 1.7k citations indexed

About

John P. Ryan is a scholar working on Surgery, Public Health, Environmental and Occupational Health and Reproductive Medicine. According to data from OpenAlex, John P. Ryan has authored 105 papers receiving a total of 1.7k indexed citations (citations by other indexed papers that have themselves been cited), including 42 papers in Surgery, 30 papers in Public Health, Environmental and Occupational Health and 22 papers in Reproductive Medicine. Recurrent topics in John P. Ryan's work include Transplantation: Methods and Outcomes (33 papers), Reproductive Biology and Fertility (28 papers) and Ovarian function and disorders (17 papers). John P. Ryan is often cited by papers focused on Transplantation: Methods and Outcomes (33 papers), Reproductive Biology and Fertility (28 papers) and Ovarian function and disorders (17 papers). John P. Ryan collaborates with scholars based in United States, Australia and Ireland. John P. Ryan's co-authors include Roger Hart, Melanie Walls, R. G. WALES, C. O’Neill, Jeffrey A. Keelan, Pablo G. Sánchez, D. M. Saunders, Caterina Rosano, Peter J. Gianaros and Lei K. Sheu and has published in prestigious journals such as The Lancet, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

John P. Ryan

96 papers receiving 1.6k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
John P. Ryan United States	23	632	475	319	288	189	105	1.7k
Johan Schiettecatte Belgium	28	477 0.8×	731 1.5×	108 0.3×	324 1.1×	369 2.0×	67	2.2k
Paolo Mannella Italy	23	176 0.3×	200 0.4×	360 1.1×	381 1.3×	79 0.4×	120	2.0k
Massimo Giusti Italy	29	157 0.2×	299 0.6×	634 2.0×	307 1.1×	119 0.6×	194	3.1k
Giorgio Radetti Italy	28	271 0.4×	163 0.3×	246 0.8×	525 1.8×	314 1.7×	90	2.4k
Svetlana Ten United States	27	435 0.7×	160 0.3×	461 1.4×	608 2.1×	180 1.0×	72	3.2k
Daniel L. Metzger Canada	29	252 0.4×	321 0.7×	427 1.3×	649 2.3×	223 1.2×	82	2.5k
Richard Berkowitz United States	20	314 0.5×	161 0.3×	301 0.9×	168 0.6×	358 1.9×	55	1.5k
C.A.M. Jansen Netherlands	23	527 0.8×	524 1.1×	115 0.4×	147 0.5×	611 3.2×	60	1.9k
Zehra Aycan Türkiye	24	207 0.3×	205 0.4×	312 1.0×	687 2.4×	223 1.2×	220	2.2k

Countries citing papers authored by John P. Ryan

Since Specialization

Citations

This map shows the geographic impact of John P. 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 P. 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 P. Ryan more than expected).

Fields of papers citing papers by John P. Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John P. Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of John P. Ryan. A scholar is included among the top collaborators of John P. 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 P. Ryan. John P. 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

Meng, Xin, John P. Ryan, Ernest G. Chan, et al.. (2025). Predicting Primary Graft Dysfunction in Systemic Sclerosis Lung Transplantation Using Machine‐Learning and CT Features. Clinical Transplantation. 39(7). e70217–e70217.

Luketich, James D., Matthew J. Schuchert, William E. Gooding, et al.. (2025). Image-guided radiofrequency ablation for treatment of stage I non–small cell lung cancer in 111 high-risk patients: Analysis of prognostic variables. Journal of Thoracic and Cardiovascular Surgery. 171(2). 500–509.e1.

Chan, Ernest G., John P. Ryan, Masashi Furukawa, et al.. (2024). Lung transplantation in HIV seropositive recipients: An analysis of the UNOS registry. Clinical Transplantation. 38(1). e15246–e15246. 4 indexed citations

Noda, Kentaro, Ernest G. Chan, John P. Ryan, et al.. (2024). The Relationship Between Ex Vivo Lung Perfusion Strategies and Transplantation Outcomes: Insights From the United Network for Organ Sharing Data. Transplantation. 109(6). 1016–1025. 2 indexed citations

Chan, Ernest G., et al.. (2023). Waitlist Mortality and Extracorporeal Membrane Oxygenation Bridge to Lung Transplant. The Annals of Thoracic Surgery. 116(1). 156–162. 10 indexed citations

Furukawa, Masashi, et al.. (2023). Impact of gastro-jejunostomy tube in lung transplant patients: a propensity-matched analysis. Interdisciplinary CardioVascular and Thoracic Surgery. 37(3). 1 indexed citations

Chan, Ernest G., et al.. (2023). Postoperative Acute Kidney Injury and Long-Term Outcomes After Lung Transplantation. The Annals of Thoracic Surgery. 116(5). 1056–1062. 8 indexed citations

Powers, Amy, Seth Eisenberg, Lora H. Rigatti, et al.. (2021). Experimental respiratory exposure to putative Gulf War toxins promotes persistent alveolar macrophage recruitment and pulmonary inflammation. Life Sciences. 282. 119839–119839. 4 indexed citations

Ryan, John P., Howard Aizenstein, Trevor J. Orchard, et al.. (2017). Basal ganglia cerebral blood flow associates with psychomotor speed in adults with type 1 diabetes. Brain Imaging and Behavior. 12(5). 1271–1278. 6 indexed citations

10.

Walls, Melanie, Roger Hart, Jeffrey A. Keelan, & John P. Ryan. (2016). Structural and morphologic differences in human oocytes after in vitro maturation compared with standard in vitro fertilization. Fertility and Sterility. 106(6). 1392–1398.e5. 16 indexed citations

11.

Walls, Melanie, John P. Ryan, Jeffrey A. Keelan, & Roger Hart. (2015). In vitromaturation is associated with increased early embryo arrest without impairing morphokinetic development of useable embryos progressing to blastocysts. Human Reproduction. 30(8). 1842–1849. 38 indexed citations

12.

Everson‐Rose, Susan A. & John P. Ryan. (2015). Diabetes, Obesity, and the Brain. Psychosomatic Medicine. 77(6). 612–615. 10 indexed citations

13.

Parent, Marise B., et al.. (2011). Glucose administration enhances fMRI brain activation and connectivity related to episodic memory encoding for neutral and emotional stimuli. Neuropsychologia. 49(5). 1052–1066. 15 indexed citations

14.

Curnow, Eliza, John P. Ryan, Douglas M. Saunders, & Eric Hayes. (2010). Primate model of metaphase I oocyte in vitro maturation and the effects of a novel glutathione donor on maturation, fertilization, and blastocyst development. Fertility and Sterility. 95(4). 1235–1240. 9 indexed citations

15.

Sidhu, Kuldip, John P. Ryan, Justin G. Lees, & Bernard E. Tuch. (2010). Derivation of a new human embryonic stem cell line, Endeavour-2, and its characterization. In Vitro Cellular & Developmental Biology - Animal. 46(3-4). 269–275. 5 indexed citations

16.

Ryan, John P., Lei K. Sheu, & Peter J. Gianaros. (2010). Resting state functional connectivity within the cingulate cortex jointly predicts agreeableness and stressor-evoked cardiovascular reactivity. NeuroImage. 55(1). 363–370. 27 indexed citations

17.

Sidhu, Kuldip, John P. Ryan, & Bernard E. Tuch. (2008). Derivation of a New Human Embryonic Stem Cell Line, Endeavour-1, and Its Clonal Propagation. Stem Cells and Development. 17(1). 41–52. 16 indexed citations

18.

Al‐Jefout, Moamar, et al.. (2006). A relative reduction in mid-follicular LH concentrations during GnRH agonist IVF/ICSI cycles leads to lower live birth rates. Human Reproduction. 21(10). 2645–2649. 46 indexed citations

19.

Jacombs, Anita, et al.. (2000). Maternal caffeine consumption during pregnancy does not affect preimplantation development but delays early postimplantation growth in rat embryos. Reproduction Fertility and Development. 11(5). 211–218. 9 indexed citations

20.

Catt, James, John P. Ryan, Ian Pike, Robert H. Porter, & D. M. Saunders. (1996). Successful Pregnancy After Fertilization Using Intracytoplasmic Sperm Injection of Sperm Lacking Acrosomes. Australian and New Zealand Journal of Obstetrics and Gynaecology. 36(1). 61–62. 1 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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