Ko Ko

961 total citations
64 papers, 631 citations indexed

About

Ko Ko is a scholar working on Epidemiology, Hepatology and Infectious Diseases. According to data from OpenAlex, Ko Ko has authored 64 papers receiving a total of 631 indexed citations (citations by other indexed papers that have themselves been cited), including 34 papers in Epidemiology, 31 papers in Hepatology and 13 papers in Infectious Diseases. Recurrent topics in Ko Ko's work include Hepatitis B Virus Studies (27 papers), Hepatitis C virus research (22 papers) and Hepatitis Viruses Studies and Epidemiology (14 papers). Ko Ko is often cited by papers focused on Hepatitis B Virus Studies (27 papers), Hepatitis C virus research (22 papers) and Hepatitis Viruses Studies and Epidemiology (14 papers). Ko Ko collaborates with scholars based in Japan, Cambodia and Burkina Faso. Ko Ko's co-authors include Junko Tanaka, Tomoyuki Akita, Masahiro Satake, Aya Sugiyama, Shintaro Nagashima, Joon Sig Choi, Miseon Lee, Jeong‐Sook Park, Yong‐Hee Kim and Masayuki Ohisa and has published in prestigious journals such as PLoS ONE, Scientific Reports and International Journal of Pharmaceutics.

In The Last Decade

Ko Ko

57 papers receiving 615 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ko Ko Japan 14 321 259 142 98 45 64 631
Anna Boroń‐Kaczmarska Poland 14 490 1.5× 466 1.8× 34 0.2× 160 1.6× 6 0.1× 64 751
M. Stoffel Belgium 15 415 1.3× 292 1.1× 80 0.6× 129 1.3× 24 0.5× 24 730
Fabrizio Romano Italy 10 145 0.5× 125 0.5× 49 0.3× 65 0.7× 14 0.3× 38 404
Marc‐Antoine Valantin France 25 686 2.1× 557 2.2× 217 1.5× 1.3k 13.1× 33 0.7× 95 2.1k
Robert P. Favier Netherlands 15 198 0.6× 208 0.8× 79 0.6× 31 0.3× 12 0.3× 38 758
Zhengwei Wan China 12 123 0.4× 56 0.2× 105 0.7× 80 0.8× 26 0.6× 38 528
Peter Flanagan United Kingdom 13 78 0.2× 69 0.3× 48 0.3× 48 0.5× 9 0.2× 37 319
Stacey A. Rizza United States 14 181 0.6× 53 0.2× 94 0.7× 231 2.4× 28 0.6× 42 558
J.‐J. Lefrère France 15 248 0.8× 223 0.9× 55 0.4× 228 2.3× 9 0.2× 46 715
Jiefu Huang China 14 78 0.2× 155 0.6× 96 0.7× 38 0.4× 12 0.3× 26 834

Countries citing papers authored by Ko Ko

Since Specialization
Citations

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

Fields of papers citing papers by Ko Ko

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ko Ko

This figure shows the co-authorship network connecting the top 25 collaborators of Ko Ko. A scholar is included among the top collaborators of Ko Ko 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 Ko Ko. Ko Ko 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.
Ouoba, Serge, Ko Ko, Aya Sugiyama, et al.. (2024). Diagnostic accuracy of hepatitis E virus antibody tests: A comprehensive meta‐analysis. Hepatology Research. 55(3). 346–362. 3 indexed citations
3.
Ko, Ko, Serge Ouoba, Aya Sugiyama, et al.. (2024). Sustained applicability of SARS-CoV-2 variants identification by Sanger Sequencing Strategy on emerging various SARS-CoV-2 Omicron variants in Hiroshima, Japan. BMC Genomics. 25(1). 1063–1063. 1 indexed citations
4.
Ouoba, Serge, Ko Ko, Moussa Lingani, et al.. (2023). Intermediate hepatitis B virus infection prevalence among 1622 pregnant women in rural Burkina Faso and implications for mother-to-child transmission. Scientific Reports. 13(1). 6115–6115. 6 indexed citations
5.
Sugiyama, Aya, Tomoyuki Akita, Ko Ko, et al.. (2023). Variant-specific Symptoms After COVID-19: A Hospital-based Study in Hiroshima. Journal of Epidemiology. 34(5). 238–246. 2 indexed citations
6.
Ko, Ko, Kazuaki Takahashi, Aya Sugiyama, et al.. (2023). Despite low viral titer in saliva samples, Sanger-based SARS-CoV-2 spike gene sequencing is highly applicable for the variant identification. BMC Medical Genomics. 16(1). 199–199. 1 indexed citations
7.
Ko, Ko, Shintaro Nagashima, Serge Ouoba, et al.. (2023). Residual risk of mother-to-child transmission of HBV despite timely Hepatitis B vaccination: a major challenge to eliminate hepatitis B infection in Cambodia. BMC Infectious Diseases. 23(1). 261–261. 6 indexed citations
8.
9.
Nagaoki, Yuko, Aya Sugiyama, Serge Ouoba, et al.. (2022). Prevalence of fatty liver and advanced fibrosis by ultrasonography and FibroScan in a general population random sample. Hepatology Research. 52(11). 908–918. 7 indexed citations
10.
Sugiyama, Aya, Shintaro Nagashima, Serge Ouoba, et al.. (2022). Seroepidemiological study of factors affecting anti-spike IgG antibody titers after a two-dose mRNA COVID-19 vaccination in 3744 healthy Japanese volunteers. Scientific Reports. 12(1). 16294–16294. 11 indexed citations
11.
Sugiyama, Aya, Ko Ko, Masayuki Ohisa, et al.. (2021). Epidemiological assessment of interventions to eliminate mother‐to‐child transmission of hepatitis B virus in japan. 3(2). 72–79. 2 indexed citations
12.
Nagashima, Shintaro, Ko Ko, Serge Ouoba, et al.. (2021). Prevalence of total hepatitis A antibody among 5 to 7 years old children and their mothers in Cambodia. Scientific Reports. 11(1). 4778–4778. 6 indexed citations
13.
14.
Ko, Ko, Kazuaki Takahashi, Shintaro Nagashima, et al.. (2020). Existence of hepatitis B virus surface protein mutations and other variants: demand for hepatitis B infection control in Cambodia. BMC Infectious Diseases. 20(1). 305–305. 13 indexed citations
15.
Woodring, Joseph, Annemarie Wasley, Shintaro Nagashima, et al.. (2019). Hepatitis B surface antigen seroprevalence among pre- and post-vaccine cohorts in Cambodia, 2017. Vaccine. 37(35). 5059–5066. 20 indexed citations
16.
Latt, Tint Swe, et al.. (2019). <p>Measurement of diabetes, prediabetes and their associated risk factors in Myanmar 2014</p>. Diabetes Metabolic Syndrome and Obesity. Volume 12. 291–298. 19 indexed citations
17.
Tanaka, Junko, et al.. (2019). Countermeasures against viral hepatitis B and C in Japan: An epidemiological point of view. Hepatology Research. 49(9). 990–1002. 59 indexed citations
18.
Latt, Tint Swe, et al.. (2016). Gaps and challenges to integrating diabetes care in Myanmar. WHO South-East Asia Journal of Public Health. 5(1). 48–48. 9 indexed citations
19.
Aye, Than Than, et al.. (2012). Summary of Myanmar Clinical Practice Guidelines for Disorders of Thyroid Function. Journal of the ASEAN Federation of Endocrine Societies. 27(1). 44–48. 1 indexed citations
20.
Shiao, Yih‐Horng, et al.. (2004). Allele-specific germ cell epimutation in the spacer promoter of the gene after Cr(III) exposure. Toxicology and Applied Pharmacology. 205(3). 290–296. 35 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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