1. Chemical and Analytical Sciences/In Silico Sciences, Sanofi-Aventis SA, 195 route d’Espagne, Toulouse, France, Computational Biophysics Group, Spanish National Cancer Research Centre (CNIO), calle Melchor Fernadéz Almagro 3, E-28029, Madrid, Spain, and Drug Discovery and Development (D3) Department, Italian Institute of Technology, Via Morego 30, I-16163, Genova, Italy