*Vertices 4
1 "AmJEpidemiol" 0.0 0.0 0.0 x_fact 14.144986 y_fact 40.666835
2 "BmcPublicHealth" 0.0 0.0 0.0 x_fact 1.414499 y_fact 7.501894
3 "EurJEpidemiol" 0.0 0.0 0.0 x_fact 2.753221 y_fact 8.714322
4 "PlosOne" 0.0 0.0 0.0 x_fact 0.707249 y_fact 43.116949
*Matrix 
0.000000 0.252605 0.304334 0.241161 
0.252605 0.000000 0.208732 0.000000 
0.304334 0.208732 0.000000 0.000000 
0.241161 0.000000 0.000000 0.000000