2.stanford university.

3. Harvard university

4. Cambridge University. ?

5. Oxford University.

6. University of California, Berkeley.

7. Princeton University.

8. Federal Institute of Technology Zurich.

9. National University of Singapore.

10, UCLA.

Imperial College London, London 1 1.

12, new york university.

13, PSL University.

14, University of Toronto. ?

California Institute of Technology 15. ?

16, Columbia University.

17, University of Chicago. ?