1. Department of Obstetrics and Gynecology, Academic Medical Center, Amsterdam, The Netherlands
2. Angewandte Tumorvirologie, Deutsches Krebsforschungszenstrum, Heidelberg, Germany
3. Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands
4. Department of Gynecology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
5. Department of Clinical and Laboratory Immunology Unit, Academic Medical Center, Amsterdam, The Netherlands; CLB Sanquin Blood Supply Foundation, Amsterdam, The Netherlands
6. Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands; l.struijk@lumc.nl