1. Department of Experimental and Clinical Medicine; Università degli Studi di Firenze; Florence Italy
2. Ospedale di Lucca; Lucca Italy
3. Department of Infectious, Parasitic and Immune Mediated Diseases; Istituto Superiore di Sanità; Rome Italy
4. Department of Translational Research, N.T.M.S.; Università di Pisa; Pisa Italy
5. National School of Tropical Medicine; Baylor College of Medicine; Houston TX USA