Caption: This network graph shows all the collaborative relations between authors. Those represented on this graph have published at least 7 Medline-type scientific articles in collaboration with other authors. Each author is represented by a circle, the diameter and size of which are proportional to the number of publications during said period. Coloured clusters represent teams of  authors who publish more frequently together. A shorter distance between authors and a thicker line connecting the circles indicate greater collaboration between the authors.

Source: publication sources from Pubmed. Analysis tool with Vos Viewer software.