Evolution of evidence in spinal surgery – past, present and future Scientometric analysis of randomized controlled trials in spinal surgery

Table 3 Co-institution collaboration network map in spinal surgery

Rank	Institutions	Publications	Degree	Centrality	Half-life
1	Thomas Jefferson Univ	16	8	0.02	1.5
2	Seoul National Univ	11	4	0	0.5
3	Univ California San Francisco	10	5	0.02	6.5
4	Dartmouth Med School	8	10	0.05	3.5
5	Dartmouth Inst Health Policy & Clinical Practice	8	5	0	0.5
6	Rush Univ	8	5	0.02	2.5
7	Linkoping Univ	8	10	0.01	3.5
8	Dartmouth Hitchcock Med Cen	8	5	0.01	0.5
9	Karolinska Inst	8	9	0	3.5
10	Leiden Univ	8	2	0	7.5