1. Department of Molecular Cellular Biology and Immunology, VU Medical Center, Free University, Amsterdam, The Netherlands.
2. The Biomedical Center, St. Petersburg, Russia.
3. Temasek LifeSciences Laboratory, Singapore.
4. Department of Human Retrovirology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
5. D.I. Ivanovsky Institute of Virology, Russian Academy of Medical Sciences, Moscow, Russia.
6. Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, Connecticut.
7. School of Public Health, University of North Carolina, Chapel Hill, North Carolina.
8. Crucell Holland BV, Leiden, The Netherlands.