Fig. 5

Co-authorship for country. The CiteScope output (A) demonstrated annual trends and clusters. Strong connections, especially involving European countries, were more structured in previous years. The VOSviewer analysis (B) showed, by considering a minimum of 3 documents for each country, 4 clusters and a total link strength of 369. Nodes in the visualization represent countries, and the size of the node corresponds to the number of papers, with larger nodes indicating a higher paper count. Lines connecting nodes represent citations from different countries, and the thickness of the line reflects the frequency of citations, with thicker lines indicating a higher frequency. Clustering is denoted by color, and nodes of the same color are part of the same cluster