*Vertices 4
1 "AmFamPhysician" 0.0 0.0 0.0 x_fact 0.301878 y_fact 1.945438
2 "BritMedJ" 0.0 0.0 0.0 x_fact 18.973614 y_fact 35.275045
3 "CochraneDbSystRev" 0.0 0.0 0.0 x_fact 7.848837 y_fact 19.979875
4 "Lancet" 0.0 0.0 0.0 x_fact 15.652952 y_fact 42.799642
*Matrix 
0.000000 0.000000 0.298973 0.000000 
0.000000 0.000000 0.784316 0.573580 
0.298973 0.784316 0.000000 0.529590 
0.000000 0.573580 0.529590 0.000000