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| Rank | Institution | Country | Centrality score |
|---|---|---|---|
| 1 | University of Perugia | Italy | 0.01 |
| 2 | University of Milan | Italy | 0.01 |
| 3 | Paula Stradina Clinical University Hospital | Latvia | 0.01 |
| 4 | Sapienza University of Rome | Italy | 0.01 |
