[1] Univ Lausanne, Ctr Hosp Univ Vaudois, Dept Med, Div Immunol & Allergy, CH-1011 Lausanne, Switzerland
[2] MRC Clin Trials Unit, London NW1 2DA, England
[3] Univ London Imperial Coll Sci Technol & Med, St Marys Hosp, London SW7 2AZ, England
[4] Univ Strasbourg, Inst Virol, F-67070 Strasbourg, France
[5] Karolinska Inst, Dept Microbiol Tumor & Cell Biol, S-17177 Stockholm, Sweden
[6] Univ Regensburg, Inst Med Microbiol, D-93053 Regensburg, Germany
[7] CSIC, Ctr Nacl Biotecnol, Dept Mol & Cellular Biol, Madrid 28049, Spain
[8] BPRC, Dept Virol, NL-2280 GH Rijswijk, Netherlands
[9] Univ Cambridge, Cambridge CB2 1TN, England
[10] Sanofi Pasteur, F-69367 Lyon, France
[11] Sanofi Pasteur, Toronto, ON M2R 3T4, Canada