1

Harvard University

2

University of Oxford

3

University of Cambridge

4

Stanford University

5

University of California, Los Angeles (UCLA)

6

Johns Hopkins University

7

Yale University

8

UCL (University College London)

9

University of California, San Francisco

10

Imperial College London

11

University of Pennsylvania

12

The University of Melbourne

13

Columbia University

14

University of Toronto

15

Duke University

16

Karolinska Institute

17

The University of Sydney

18

Massachusetts Institute of Technology (MIT)

19

King's College London (KCL)

20

The University of Tokyo