*Vertices 9
1 "ActaNeurochir" 0.0 0.0 0.0 x_fact 5.111694 y_fact 5.812062
2 "AmJNeuroradiol" 0.0 0.0 0.0 x_fact 6.246888 y_fact 10.475653
3 "JNeurosurg" 0.0 0.0 0.0 x_fact 9.403525 y_fact 16.851993
4 "Lancet" 0.0 0.0 0.0 x_fact 0.726923 y_fact 7.783716
5 "Neurocirugia" 0.0 0.0 0.0 x_fact 2.688618 y_fact 2.881137
6 "Neurosurgery" 0.0 0.0 0.0 x_fact 8.580343 y_fact 12.563481
7 "Spine" 0.0 0.0 0.0 x_fact 3.040462 y_fact 21.548777
8 "Stroke" 0.0 0.0 0.0 x_fact 3.717596 y_fact 14.847147
9 "SurgNeurol" 0.0 0.0 0.0 x_fact 6.449364 y_fact 7.236034
*Matrix 
0.000000 0.543633 0.971664 0.000000 0.961314 0.982796 0.000000 0.000000 0.989695 
0.543633 0.000000 0.565801 0.000000 0.495564 0.595994 0.000000 0.453333 0.565268 
0.971664 0.565801 0.000000 0.000000 0.945597 0.976736 0.000000 0.230350 0.980307 
0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.223968 0.000000 
0.961314 0.495564 0.945597 0.000000 0.000000 0.939701 0.345052 0.000000 0.971713 
0.982796 0.595994 0.976736 0.000000 0.939701 0.000000 0.000000 0.289235 0.983942 
0.000000 0.000000 0.000000 0.000000 0.345052 0.000000 0.000000 0.000000 0.213653 
0.000000 0.453333 0.230350 0.223968 0.000000 0.289235 0.000000 0.000000 0.235114 
0.989695 0.565268 0.980307 0.000000 0.971713 0.983942 0.213653 0.235114 0.000000