[1] CNR, ICoCEA, I-40129 Bologna, Italy
[2] Univ Ferrara, Dipartimento Sci Farmaceut, I-44100 Ferrara, Italy
[3] Univ Frankfurt Klinikum, Inst Med Virol, D-60596 Frankfurt, Germany
[4] Katholieke Univ Leuven, Rega Inst Med Res, B-3000 Louvain, Belgium
[5] Univ Montpellier 2, Chim Bioorgan Lab, UMR CNRS USTL 5625, F-34095 Montpellier 5, France