Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
A systematic review of task- shifting for HIV treatment and care in Africa
2010485 citationsMike Callaghan, Nathan Ford et al.Human Resources for Healthprofile →
Countries citing papers authored by Mike Callaghan
Since
Specialization
Citations
This map shows the geographic impact of Mike 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 Mike Callaghan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Mike Callaghan more than expected).
This network shows the impact of papers produced by Mike 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 Mike Callaghan. The network helps show where Mike Callaghan may publish in the future.
Co-authorship network of co-authors of Mike Callaghan
This figure shows the co-authorship network connecting the top 25 collaborators of Mike Callaghan.
A scholar is included among the top collaborators of Mike 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 Mike Callaghan. Mike Callaghan is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
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.