Fig. 2
From: Health policy and systems research collaboration pathways: lessons from a network science analysis
Health policy and systems research co-authorship network structure from 1990 to 2004. In contrast to previous intervals, a large connected component (LCC) is formed during this interval (upper part of the left panel). The right panel shows an enlarged view of this LCC, which shows various sub-structures, may suggest the beginning of a broad and heterogeneous pattern of collaboration among co-authors. Colour codes are the same as Fig. 1. Of a total of 2887 nodes in this interval, 2281 contribute to the formation of SDCs and 606 belong to the LCC. 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)