Fig. 2.

VOSviewer occurrence term map of the global hot topics of leishmaniasis research over the period of 1998–2017 which extracted from titles and abstracts of publications in the Scopus. The size and color a term indicate the frequency and the cluster with which the terms have been appeared respectively. In general, the closer two terms in the map indicating the stronger their relation. Out of 184,935 terms, 1586 terms meet the threshold by using minimum number of occurrence threshold of 50. By default, VOSviewer reducing the terms to the most relevant 60% results in 952 terms which encompass 4 main clusters in four colors: red, green, yellow, and blue