Figure 1.

(a) The bubble map visualizes the medical subject headings (MeSH) keywords selected from papers published and retrieved in PubMed under the search terms term “cardiovascular disease risk factors” and “Mediterranean diet” and “olive oil”. The bubble size indicates the frequency of occurrence of the words, while the bubble color represents the cluster of belonging. Two bubbles are in closer proximity if the two words had more frequent co-occurrence. (b) The map highlights MeSH terms directly connected to Mediterranean diet. Analysis was performed by the bibliometric mapping tool VOSviewer.