Fig. 2

Co-occurrence network of keywords in policy-related publications on medical tourism in select source and destination countries. The figure shows the relatedness of author designated and auto indexed keywords (with at least three occurrences) based on how frequently they occur in the same publications. Nodes depict keywords and their linkages convey co-occurrence relationships. Larger nodes indicate keywords with more occurrences. Link strengths indicate the frequency with which they co-occur. Keywords that co-occur more frequently are clustered together in nodes of the same color