Table 3. International scientific network (authors) statistics.

Rank	Degree centrality	Authors (inc)	Betweenness centrality	Authors (inc)	PageRank	Authors (inc)
1.	113	Palefsky, J (3)	72,188	Shah, KV (3)	0.005	Palefsky, J (3)
2.	95	Burk, R (3)	59,863	Franceschi, S (3)	0.004	Burk, R (3)
3.	85	Shah, KV (3)	51,046	Palefsky, J (3)	0.004	Shah, KV (3)
4.	82	Minkoff, H (3)	49,355	Massad, LS (3)	0.003	Minkoff, H (3)
5.	69	Anastos, K (3)	48,743	Watts, DH (3)	0.003	Watts, DH (3)
6.	69	Watts, DH (3)	43,227	Levi, JE (2)	0.003	Cu-Uvin, S (3)
7.	68	Levine, AM (3)	37,387	Gravitt, PE (3)	0.003	Anastos, K (3)
8.	67	Cu-Uvin, S (3)	34,794	Gonçalves, M (2)	0.003	Strickler, HD (3)
9.	67	Strickler, HD (3)	33.644	Smith, JS (3)	0.003	Levine, AM (3)
10.	62	Massad, LS (3)	32,535	Lima, LP (2)	0.003	Williamson, S (2)

inc- income-level of the country of origin: (3) high-income, (2) middle-income and (1) low-income country. The definitions of the network statics here presented can be found in the Materials and Methods section, sub-section Social Network Analysis.