Author(s) affiliations:Marc Throsby1, Josiane Coulaud2, Sylvie Durant3 and Françoise Homo-Delarche2
1Crucell Holland B.V., Leiden 2301 CA, The Netherlands.
2CNRS UMR 7059, Paris 7 University, 75005 Paris, France.
3INSERM U530, Centre Universitaire-UFR Biomédicale, 75006 Paris, France.