1. Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, Viale Andrea Doria, 6, 95125 Catania, Italy
2. Cancer Vaccine Center, Dana-Farber Cancer Institute, 77 Avenue Louis Pasteur, HIM 401, Boston, MA 02115, USA
3. University of Bonn, Bonn-Aachen International Center for IT (B-IT), Algorithmic Bioinformatics, Dahlmannstr, 2, 53113 Bonn, Germany