Fig. 7
From: Health policy and systems research collaboration pathways: lessons from a network science analysis
A subset of the 1990–2015 co-authorship network (n = 1026 nodes) that includes the most prolific authors (with 15 papers and more), as well as their first neighbours. The first neighbour of a node are those nodes that are directly connected to that original node by an edge. This figure is information rich and shows more attributes per node, including the number of publications (body colour) the number of times an author’s work is cited (size) and the first-author’s economic region (border colour). Orange colour indicates low-income countries (LICs), green for lower middle-income countries (LowerMICs), pink for upper middle-income countries (UpperMICs) and blue for high-income countries (HICs)