[1] Univ Maryland, Inst Human Virol, Baltimore, MD 21201 USA
[2] Inst Jean Godinoi, F-51100 Reims, France
[3] Univ Pierre & Marie Curie, Paris, France
[4] Univ Milan, I-20122 Milan, Italy
[5] Maggiore Hosp, IRCCS, A Bianchi Bonomi Hemophilia & Thrombosis Ctr, Bologna, Italy
[6] Allegheny Univ Hlth Sci, Ctr Neurovirol & Neurooncol, Philadelphia, PA 19102 USA
[7] Univ Libre Bruxelles, B-1050 Brussels, Belgium
[8] Weizmann Inst Sci, IL-76100 Rehovot, Israel