*Vertices 4
1 "AmJPrevMed" 0.0 0.0 0.0 x_fact 5.948104 y_fact 22.514970
2 "AmJPublicHealth" 0.0 0.0 0.0 x_fact 16.447106 y_fact 34.471058
3 "AnnuRevPublHealth" 0.0 0.0 0.0 x_fact 3.393214 y_fact 3.992016
4 "SocSciMed" 0.0 0.0 0.0 x_fact 5.648703 y_fact 39.021956
*Matrix 
0.000000 0.515026 0.658025 0.000000 
0.515026 0.000000 0.929675 0.535888 
0.658025 0.929675 0.000000 0.614382 
0.000000 0.535888 0.614382 0.000000