1. Institute for Research in Biomedicine (IRB Barcelona), Parc Científic de Barcelona, C/Baldiri Reixac
10, 08028 Barcelona, Spain
2. The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, California 92037, United States
3. Division
of Computational Bioscience, Center for Information Technology, National Institutes of Health, Building 12A, Bethesda, Maryland 20892-5624, United States
4. Laboratory
of Physical Chemistry, Swiss Federal Institute of Technology, ETH-Hönggerberg, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland