John C. Leonidas

3.2k total citations
107 papers, 2.2k citations indexed

About

John C. Leonidas is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Epidemiology. According to data from OpenAlex, John C. Leonidas has authored 107 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 58 papers in Surgery, 28 papers in Pulmonary and Respiratory Medicine and 16 papers in Epidemiology. Recurrent topics in John C. Leonidas's work include Congenital Diaphragmatic Hernia Studies (16 papers), Intestinal Malrotation and Obstruction Disorders (13 papers) and Gastrointestinal disorders and treatments (9 papers). John C. Leonidas is often cited by papers focused on Congenital Diaphragmatic Hernia Studies (16 papers), Intestinal Malrotation and Obstruction Disorders (13 papers) and Gastrointestinal disorders and treatments (9 papers). John C. Leonidas collaborates with scholars based in United States and Greece. John C. Leonidas's co-authors include Mary Ann Radkowski, David F. Merten, Robert T. Hall, Alan M. Schwartz, Eugene C. Beatty, Mark Guelfguat, Ina Bhan, Raymond A. Amoury, Walter E. Berdon and Jerrold M. Becker and has published in prestigious journals such as The Lancet, JAMA and PEDIATRICS.

In The Last Decade

John C. Leonidas

105 papers receiving 2.0k 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 C. Leonidas United States 28 1.2k 558 462 422 220 107 2.2k
H. Carty United Kingdom 28 1.0k 0.9× 522 0.9× 432 0.9× 271 0.6× 213 1.0× 120 2.3k
David F. Merten United States 24 720 0.6× 500 0.9× 645 1.4× 433 1.0× 111 0.5× 75 2.3k
Leonard E. Swischuk United States 31 1.8k 1.5× 617 1.1× 306 0.7× 366 0.9× 178 0.8× 247 2.8k
James S. Meyer United States 28 1.2k 1.0× 713 1.3× 235 0.5× 163 0.4× 139 0.6× 70 2.4k
Sabah Servaes United States 25 661 0.6× 547 1.0× 397 0.9× 353 0.8× 365 1.7× 102 2.0k
Lisa H. Lowe United States 23 879 0.8× 308 0.6× 382 0.8× 233 0.6× 119 0.5× 72 1.7k
Marta Hernanz‐Schulman United States 33 1.8k 1.5× 923 1.7× 507 1.1× 498 1.2× 698 3.2× 119 3.8k
Boaz Karmazyn United States 26 992 0.9× 471 0.8× 562 1.2× 358 0.8× 303 1.4× 115 2.1k
Robert A. Kaufman United States 26 736 0.6× 477 0.9× 148 0.3× 234 0.6× 524 2.4× 105 2.1k
Alan Sprigg United Kingdom 21 526 0.5× 256 0.5× 527 1.1× 173 0.4× 188 0.9× 56 1.3k

Countries citing papers authored by John C. Leonidas

Since Specialization
Citations

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

Fields of papers citing papers by John C. Leonidas

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John C. Leonidas

This figure shows the co-authorship network connecting the top 25 collaborators of John C. Leonidas. A scholar is included among the top collaborators of John C. Leonidas 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 C. Leonidas. John C. Leonidas 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.
Leonidas, John C., Mark Guelfguat, & Elsa Valderrama. (2003). Langerhans' cell histiocytosis. The Lancet. 361(9365). 1293–1295. 51 indexed citations
2.
Aygün, Banu, et al.. (2003). Reliability of Splenic Index to Assess Splenic Involvement in Pediatric Hodgkin's Disease. Journal of Pediatric Hematology/Oncology. 26(1). 74–76. 4 indexed citations
3.
Aygün, Banu, et al.. (2003). An Adolescent With Ovarian Osteosarcoma Arising in a Cystic Teratoma. Journal of Pediatric Hematology/Oncology. 25(5). 410–413. 15 indexed citations
4.
Forman, Howard P., Jeffrey Traubici, Anne M. Covey, et al.. (2001). Pediatric Radiology at the Millennium. Radiology. 220(1). 109–114. 7 indexed citations
5.
Guelfguat, Mark, et al.. (2000). Acute appendicitis in children: comparison of clinical diagnosis with ultrasound and CT imaging. Pediatric Radiology. 30(2). 94–98. 96 indexed citations
6.
Leonidas, John C., et al.. (1998). Magnetic resonance imaging in acute pyelonephritis. Pediatric Nephrology. 12(7). 579–580. 14 indexed citations
7.
Slovis, T L, Manuel P. Meza, Barbara Cushing, et al.. (1997). Thoracic neuroblastoma: what is the best imaging modality for evaluating extent of disease?. Pediatric Radiology. 27(3). 273–275. 19 indexed citations
8.
Leonidas, John C., et al.. (1997). Extraperitoneal abdominopelvic inflammatory pseudotumor: report of four cases. Pediatric Radiology. 27(2). 170–174. 19 indexed citations
9.
Leonidas, John C., et al.. (1994). Severe cystic pulmonary disease associated with chronicPneumocystis carinii infection in a child with AIDS. Pediatric Radiology. 24(8). 606–608. 11 indexed citations
10.
Leonidas, John C., et al.. (1991). Granulomatous hepatitis in cat-scratch disease. Pediatric Radiology. 21(8). 598–599. 18 indexed citations
11.
Forman, Howard P., et al.. (1990). A rational approach to the diagnosis of hypertrophic pyloric stenosis: Do the results match the claims?. Journal of Pediatric Surgery. 25(2). 262–266. 29 indexed citations
12.
SCHIFF, ROBERT, et al.. (1990). Lymphoma of the mediastinum and neck: evaluation with Ga-67 imaging and CT correlation.. Radiology. 174(1). 171–175. 27 indexed citations
13.
Forman, Howard P., et al.. (1990). Congenital neuroblastoma: evaluation with multimodality imaging.. Radiology. 175(2). 365–368. 32 indexed citations
14.
Forman, Howard P., John C. Leonidas, & Donald R. Kirks. (1990). Clinical activities of pediatric radiologists in the United States and Canada: 10-year follow-up.. Radiology. 175(1). 127–129. 6 indexed citations
15.
Leonidas, John C.. (1989). Microcolon in the absence of small bowel obstruction in the newborn. Journal of Pediatric Surgery. 24(2). 180–182. 2 indexed citations
16.
Leonidas, John C., et al.. (1989). Aneurysm of the vein of Galen. Pediatric Radiology. 20(1-2). 98–100. 3 indexed citations
17.
SCHIFF, ROBERT, et al.. (1987). The Noninvasive Diagnosis of Intrathoracic Splenosis Using Technetium-99m Heat-Damaged Red Blood Cells. Clinical Nuclear Medicine. 12(10). 785–787. 25 indexed citations
18.
Leonidas, John C.. (1976). Gastric pneumatosis in infancy.. Archives of Disease in Childhood. 51(5). 395–398. 10 indexed citations
19.
Leonidas, John C., et al.. (1973). Radionuclide lung scanning in the diagnosis of endobronchial foreign bodies in children. The Journal of Pediatrics. 83(4). 628–631. 25 indexed citations
20.
Leonidas, John C., Walter E. Berdon, & Donald Gribetz. (1971). Bilateral renal cortical necrosis in the newborn infant: Roentgenographic diagnosis. The Journal of Pediatrics. 79(4). 623–627. 14 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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