*Vertices 9
1 "ArchNeurolChicago" 0.0 0.0 0.0 x_fact 5.104027 y_fact 6.520328
2 "Brain" 0.0 0.0 0.0 x_fact 6.295094 y_fact 9.394923
3 "Cephalalgia" 0.0 0.0 0.0 x_fact 4.913151 y_fact 8.043520
4 "Headache" 0.0 0.0 0.0 x_fact 4.252720 y_fact 6.669212
5 "JNeurolNeurosurPs" 0.0 0.0 0.0 x_fact 7.982439 y_fact 10.349303
6 "JamaJAmMedAssoc" 0.0 0.0 0.0 x_fact 3.729719 y_fact 10.803588
7 "Lancet" 0.0 0.0 0.0 x_fact 3.680092 y_fact 12.395495
8 "Neurology" 0.0 0.0 0.0 x_fact 12.704715 y_fact 26.318000
9 "Pain" 0.0 0.0 0.0 x_fact 1.958389 y_fact 9.505631
*Matrix 
0.000000 0.829173 0.347925 0.386925 0.920628 0.214289 0.244117 0.975049 0.000000 
0.829173 0.000000 0.338760 0.339151 0.900568 0.000000 0.201762 0.831697 0.000000 
0.347925 0.338760 0.000000 0.956955 0.324764 0.000000 0.000000 0.380192 0.000000 
0.386925 0.339151 0.956955 0.000000 0.353374 0.000000 0.000000 0.420401 0.000000 
0.920628 0.900568 0.324764 0.353374 0.000000 0.000000 0.263376 0.937179 0.000000 
0.214289 0.000000 0.000000 0.000000 0.000000 0.000000 0.538890 0.209643 0.000000 
0.244117 0.201762 0.000000 0.000000 0.263376 0.538890 0.000000 0.241712 0.000000 
0.975049 0.831697 0.380192 0.420401 0.937179 0.209643 0.241712 0.000000 0.000000 
0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000