[1] Louisiana State Univ, Hlth Sci Ctr, Dept Microbiol & Immunol, Ctr Mol & Tumor Virol, Shreveport, LA 71130 USA
[2] Johannes Gutenberg Univ Mainz, Inst Med Microbiol & Hyg, D-55101 Mainz, Germany
[3] NCI, Cellular Oncol Lab, Ctr Canc Res, NIH, Bethesda, MD 20892 USA
[4] Acad Ctr Dent Amsterdam, Dept Dent Basic Sci, Amsterdam, Netherlands