Stats and Layout - Graph Analysis and Visualization - page 106

Figure 4-3: This graph is from an early study of HIV where patient 0 is
the first HIV case and also the highest degree, making him suspect as an
early source.
Original source: American Journal of Medicine , March 1984 (redrawn based on
http://en.wikipedia.org/wiki/File:AIDS_index_case_graph.svg )
Note
This graph was re-created in Gephi. For a more detailed graph and
more information on Gaëtan, see http://en.wikipedia.org/wiki/
Ga%C3%ABtan_Dugas .