The THE Life Sciences Ranking (subscription required)

First is MIT, then Harvard, then Stanford. Nothing to argue about there.

For research impact (i.e. citations) the order is:

1.. MIT
2. University of Barcelona
3. Harvard
4. Princeton
5. Stanford
6. Oxford
7. Dundee
8. Hong Kong
9. Monash
10. Berkeley

In this subject group, the citations indicator gets 37.5%.