John Tjia

1.6k total citations
23 papers, 1.3k citations indexed

About

John Tjia is a scholar working on Infectious Diseases, Virology and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, John Tjia has authored 23 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Infectious Diseases, 11 papers in Virology and 6 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in John Tjia's work include HIV/AIDS drug development and treatment (17 papers), HIV Research and Treatment (11 papers) and HIV/AIDS Research and Interventions (6 papers). John Tjia is often cited by papers focused on HIV/AIDS drug development and treatment (17 papers), HIV Research and Treatment (11 papers) and HIV/AIDS Research and Interventions (6 papers). John Tjia collaborates with scholars based in United Kingdom, Ireland and Uganda. John Tjia's co-authors include David Back, Fiona Mulcahy, Michael Barry, Saye Khoo, Sara E. Gibbons, Concepta Merry, Máirín Ryan, S Clarke, Helen Reynolds and Laura Else and has published in prestigious journals such as Clinical Infectious Diseases, Antimicrobial Agents and Chemotherapy and Biochemical Pharmacology.

In The Last Decade

John Tjia

23 papers receiving 1.3k 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 Tjia United Kingdom 17 725 452 332 236 220 23 1.3k
Thomas R. MacGregor United States 19 695 1.0× 487 1.1× 171 0.5× 151 0.6× 137 0.6× 46 1.3k
Jon F. Denissen United States 14 1.2k 1.6× 829 1.8× 281 0.8× 239 1.0× 228 1.0× 23 1.9k
Sara Gibbons United Kingdom 22 1.3k 1.8× 589 1.3× 194 0.6× 416 1.8× 368 1.7× 34 1.8k
D.J. Back United Kingdom 29 596 0.8× 347 0.8× 615 1.9× 475 2.0× 125 0.6× 80 2.2k
Manoli Vourvahis United States 21 502 0.7× 262 0.6× 334 1.0× 277 1.2× 73 0.3× 55 1.4k
John P. Sabo United States 16 555 0.8× 374 0.8× 150 0.5× 134 0.6× 109 0.5× 34 919
C.P.W.G.M. Verwey-van Wissen Netherlands 21 590 0.8× 347 0.8× 133 0.4× 186 0.8× 103 0.5× 34 1.1k
Edward O’Mara United States 21 668 0.9× 149 0.3× 369 1.1× 215 0.9× 171 0.8× 46 1.6k
Caroline Solas France 23 920 1.3× 430 1.0× 93 0.3× 162 0.7× 171 0.8× 94 1.5k
Cornelis H.W. Koks Netherlands 18 466 0.6× 186 0.4× 190 0.6× 221 0.9× 82 0.4× 38 1.3k

Countries citing papers authored by John Tjia

Since Specialization
Citations

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

Fields of papers citing papers by John Tjia

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John Tjia

This figure shows the co-authorship network connecting the top 25 collaborators of John Tjia. A scholar is included among the top collaborators of John Tjia 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 Tjia. John Tjia 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.
Amara, Alieu, Laura Else, John Tjia, et al.. (2014). A Validated Method for Quantification of Efavirenz in Dried Blood Spots Using High-Performance Liquid Chromatography–Mass Spectrometry. Therapeutic Drug Monitoring. 37(2). 220–228. 25 indexed citations
2.
Penchala, Sujan Dilly, et al.. (2013). Validation of an electrospray ionisation LC–MS/MS method for quantitative analysis of telaprevir and its R-diastereomer. Journal of Chromatography B. 932. 100–110. 7 indexed citations
3.
Jackson, Akil, Graeme Moyle, Victoria Watson, et al.. (2012). Tenofovir, Emtricitabine Intracellular and Plasma, and Efavirenz Plasma Concentration Decay Following Drug Intake Cessation. JAIDS Journal of Acquired Immune Deficiency Syndromes. 62(3). 275–281. 39 indexed citations
4.
Lamorde, Mohammed, Pauline Byakika‐Kibwika, Marta Boffito, et al.. (2012). Steady-State Pharmacokinetics of Lopinavir Plus Ritonavir When Administered Under Different Meal Conditions in HIV-Infected Ugandan Adults. JAIDS Journal of Acquired Immune Deficiency Syndromes. 60(3). 295–298. 8 indexed citations
5.
Else, Laura, Akil Jackson, Rebekah Puls, et al.. (2011). Pharmacokinetics of Lamivudine and Lamivudine-Triphosphate after Administration of 300 Milligrams and 150 Milligrams Once Daily to Healthy Volunteers: Results of the ENCORE 2 Study. Antimicrobial Agents and Chemotherapy. 56(3). 1427–1433. 28 indexed citations
6.
7.
Randell, Paul, Akil Jackson, Marta Boffito, et al.. (2010). Effect of boosted fosamprenavir or lopinavir-based combinations on whole-body insulin sensitivity and lipids in treatment-naive HIV-type-1-positive men. Antiviral Therapy. 15(8). 1125–1132. 13 indexed citations
8.
9.
Lindup, W E, et al.. (2003). Extraction of Uraemic Toxins with Activated Carbon Restores the Functional Properties of Albumin. Nephron Physiology. 95(1). p10–p18. 4 indexed citations
10.
Hennessy, Martina, S Clarke, Paul Spiers, et al.. (2003). Intracellular Indinavir Pharmacokinetics in HIV-Infected Patients: Comparison with Plasma Pharmacokinetics. Antiviral Therapy. 8(3). 191–198. 21 indexed citations
11.
Lindup, W E, et al.. (2002). Effect of protein-bound uraemic toxins on the thermodynamic characteristics of human albumin. Biochemical Pharmacology. 63(7). 1287–1296. 16 indexed citations
12.
Khoo, Saye, Patrick G. Hoggard, Ian Williams, et al.. (2002). Intracellular Accumulation of Human Immunodeficiency Virus Protease Inhibitors. Antimicrobial Agents and Chemotherapy. 46(10). 3228–3235. 67 indexed citations
13.
Clarke, S, Fiona Mulcahy, John Tjia, et al.. (2001). Pharmacokinetic Interactions of Nevirapine and Methadone and Guidelines for Use of Nevirapine to Treat Injection Drug Users. Clinical Infectious Diseases. 33(9). 1595–1597. 81 indexed citations
14.
Back, David, Saye Khoo, Sara E. Gibbons, et al.. (2001). Therapeutic drug monitoring of anti-HIV drugs. International Congress Series. 1220. 145–160. 1 indexed citations
15.
Clarke, S, Fiona Mulcahy, John Tjia, et al.. (2001). The pharmacokinetics of methadone in HIV‐positive patients receiving the non‐nucleoside reverse transcriptase inhibitor efavirenz. British Journal of Clinical Pharmacology. 51(3). 213–217. 115 indexed citations
16.
Gill, Helen, et al.. (1999). The effect of genetic polymorphisms in CYP2C9 on sulphamethoxazole N-hydroxylation. Pharmacogenetics. 9(1). 43–54. 41 indexed citations
17.
Merry, Concepta, Michael Barry, Máirín Ryan, et al.. (1999). Interaction of sildenafil and indinavir when co-administered to HIV-positive patients. AIDS. 13(15). 101–107. 71 indexed citations
18.
Tjia, John, et al.. (1998). Differential selectivity of cytochrome P450 inhibitors against probe substrates in human and rat liver microsomes. British Journal of Clinical Pharmacology. 45(2). 107–114. 299 indexed citations
19.
Merry, Concepta, Michael Barry, Fiona Mulcahy, et al.. (1998). The pharmacokinetics of combination therapy with nelfinavir plus nevirapine. AIDS. 12(10). 1163–1167. 39 indexed citations
20.
Merry, Concepta, Michael Barry, Fiona Mulcahy, et al.. (1997). Saquinavir pharmacokinetics alone and in combination with ritonavir in HIV-infected patients. AIDS. 11(4). F29–F33. 159 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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