John M. O’Callaghan

1.7k total citations
32 papers, 841 citations indexed

About

John M. O’Callaghan is a scholar working on Surgery, Transplantation and Public Health, Environmental and Occupational Health. According to data from OpenAlex, John M. O’Callaghan has authored 32 papers receiving a total of 841 indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Surgery, 12 papers in Transplantation and 11 papers in Public Health, Environmental and Occupational Health. Recurrent topics in John M. O’Callaghan's work include Renal Transplantation Outcomes and Treatments (12 papers), Organ Transplantation Techniques and Outcomes (11 papers) and Organ Donation and Transplantation (8 papers). John M. O’Callaghan is often cited by papers focused on Renal Transplantation Outcomes and Treatments (12 papers), Organ Transplantation Techniques and Outcomes (11 papers) and Organ Donation and Transplantation (8 papers). John M. O’Callaghan collaborates with scholars based in United Kingdom, United States and Australia. John M. O’Callaghan's co-authors include Simon Knight, Robert D. Morgan, Peter J. Morris, Ina Jochmans, Rutger J. Ploeg, Jacques Pirenne, Liset Pengel, J.E.F. Fitzgerald, Vimal J. Gokani and Rhiannon Harries and has published in prestigious journals such as NeuroImage, Annals of Surgery and British journal of surgery.

In The Last Decade

John M. O’Callaghan

31 papers receiving 819 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
John M. O’Callaghan United Kingdom 12 460 308 276 193 134 32 841
Nicholas R. Brook United Kingdom 22 764 1.7× 530 1.7× 312 1.1× 79 0.4× 58 0.4× 60 1.3k
L.W. Miller United States 16 918 2.0× 66 0.2× 580 2.1× 52 0.3× 34 0.3× 45 1.4k
Hannelore Barg‐Hock Germany 21 485 1.1× 60 0.2× 151 0.5× 642 3.3× 20 0.1× 43 1.1k
Elizabeth Kendrick United States 13 219 0.5× 72 0.2× 350 1.3× 77 0.4× 11 0.1× 19 753
Nadey S Hakim United Kingdom 17 897 1.9× 450 1.5× 824 3.0× 67 0.3× 12 0.1× 68 1.4k
Nadey Hakim United Kingdom 21 702 1.5× 452 1.5× 865 3.1× 62 0.3× 11 0.1× 62 1.3k
Arun Gupta India 14 237 0.5× 92 0.3× 224 0.8× 10 0.1× 23 0.2× 53 706
Ahmet Akgül Türkiye 16 291 0.6× 25 0.1× 63 0.2× 37 0.2× 20 0.1× 73 753
Vincenzo Li Marzi Italy 21 453 1.0× 260 0.8× 110 0.4× 21 0.1× 19 0.1× 93 1.5k
Richard Butterfield United States 14 112 0.2× 65 0.2× 24 0.1× 25 0.1× 17 0.1× 88 524

Countries citing papers authored by John M. O’Callaghan

Since Specialization
Citations

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

Fields of papers citing papers by John M. O’Callaghan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John M. O’Callaghan. 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 M. O’Callaghan. The network helps show where John M. O’Callaghan may publish in the future.

Co-authorship network of co-authors of John M. O’Callaghan

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

All Works

20 of 20 papers shown
1.
2.
O’Donoghue, Keelin, et al.. (2019). PRINTED PATIENT INFORMATION PROVIDED BY UK RENAL TRANSPLANT CENTRES: DO THEY ADEQUATELY ANSWER QUESTIONS ASKED BY TRANSPLANT RECIPIENTS, PATIENTS ON THE TRANSPLANT WAITING LIST, CARERS AND LIVE KIDNEY DONORS?. Transplant International. 32. 199–199. 1 indexed citations
3.
O’Callaghan, John M., Helen Mohan, Anna E. Sharrock, et al.. (2017). Cross-sectional study of the financial cost of training to the surgical trainee in the UK and Ireland. BMJ Open. 7(11). e018086–e018086. 70 indexed citations
4.
O’Callaghan, John M., et al.. (2017). Supplemental oxygen during hypothermic kidney preservation: A systematic review. Transplantation Reviews. 31(3). 172–179. 15 indexed citations
5.
O’Callaghan, John M., et al.. (2017). Quick reference guide to apixaban. Vascular Health and Risk Management. Volume 13. 263–267. 10 indexed citations
6.
O’Donoghue, Keelin, Rhiannon D. Reed, Simon Knight, et al.. (2017). Systematic review of clinical practice guidelines in kidney transplantation. BJS Open. 1(4). 97–105. 6 indexed citations
7.
Hotchen, Andrew, et al.. (2016). Safe and sustainable increases in day case emergency surgery. British Journal of Hospital Medicine. 77(3). 180–183. 4 indexed citations
8.
O’Callaghan, John M., Simon Knight, Robert D. Morgan, & Peter J. Morris. (2016). A National Registry Analysis of Kidney Allografts Preserved With Marshall’s Solution in the United Kingdom. Transplantation. 100(11). 2447–2452. 6 indexed citations
9.
Jochmans, Ina, M.Z. Akhtar, David Nasralla, et al.. (2016). Past, Present, and Future of Dynamic Kidney and Liver Preservation and Resuscitation. American Journal of Transplantation. 16(9). 2545–2555. 80 indexed citations
10.
Handa, Ashok, et al.. (2016). Risk impact of edoxaban in the management of stroke and venous thromboembolism. Vascular Health and Risk Management. Volume 12. 329–335. 2 indexed citations
11.
Colgan, Niall, Bernard Siow, John M. O’Callaghan, et al.. (2015). Application of neurite orientation dispersion and density imaging (NODDI) to a tau pathology model of Alzheimer's disease. NeuroImage. 125. 739–744. 154 indexed citations
12.
O’Callaghan, John M., Simon Knight, R. P. C. Morgan, & Philip Morris. (2014). A Comparison of University of Wisconsin and Marshallʼs Solutions for Cold Storage of Deceased Donor Kidneys in the United Kingdom.. Transplantation. 98. 268–268. 1 indexed citations
13.
O’Callaghan, John M., et al.. (2012). Preservation Solutions for Static Cold Storage of Kidney Allografts: A Systematic Review and Meta-Analysis. American Journal of Transplantation. 12(4). 896–906. 80 indexed citations
14.
Morgan, Robert D., John M. O’Callaghan, Simon Knight, & Peter J. Morris. (2012). Alemtuzumab Induction Therapy in Kidney Transplantation. Transplantation. 93(12). 1179–1188. 65 indexed citations
15.
Morgan, Robert D., et al.. (2012). Surgical correction of tracheo-oesophageal fistula and oesophageal atresia in infants with VACTERL association: a retrospective case–control study. Pediatric Surgery International. 28(10). 967–970. 4 indexed citations
16.
Morgan, Robert D., John M. O’Callaghan, Simon Knight, & P. J. Morris. (2012). Alemtuzumab Induction Therapy in Kidney Transplantation: a Systematic Review and Meta-Analysis. Transplantation. 94(10S). 972–972. 10 indexed citations
17.
Sadideen, Hazim, John M. O’Callaghan, Maziar Navidi, & Mazin Sayegh. (2011). Educating Surgical Patients to Reduce the Risk of Venous Thromboembolism: An Audit of an Effective Strategy. JRSM Short Reports. 2(12). 1–4. 6 indexed citations
18.
Antonio, Martín, Hannah Dada-Adegbola, Timothy Awine, et al.. (2008). Molecular epidemiology of pneumococci obtained from Gambian children aged 2–29 months with invasive pneumococcal disease during a trial of a 9-valent pneumococcal conjugate vaccine. BMC Infectious Diseases. 8(1). 81–81. 46 indexed citations
19.
O’Callaghan, John M., et al.. (2008). Thyroid chondroma as a differential for thyroglossal cyst. Otolaryngology. 139(4). 594–595. 2 indexed citations
20.
Morrell, Stephen, et al.. (2002). Early cervical cancer rescreening. Journal of Medical Screening. 9(1). 26–32. 6 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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