Table 4. Top 10 institutions for centrality.

Rank	Institution	Centrality
1	University of Pittsburgh	0.17
2	Stanford University	0.05
3	Harvard University	0.04
4	Brigham & Women’s Hospital	0.04
5	Harvard Medical School	0.04
6	Duke University	0.04
7	University of California, Los Angeles	0.04
8	Emory University	0.04
9	Washington University	0.03
10	Huazhong University of Science & Technology	0.03