1. Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, via G. Moruzzi 13, I-56124 Pisa, Italy
2. UPMC Univ. Paris
06, Institut des Sciences du Calcul et des Données, F-75005, Paris, France
3. Institut
für Physikalische Chemie, Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
4. UPMC Univ. Paris
06, UMR7616, Laboratoire de Chimie Théorique, F-75005, Paris, France
5. Institut Universitaire de France, Paris
Cedex 05, 75231, France
6. Department
of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States