Affiliation: | a Division of Obstetrics and Gynecology, Department for Clinical Science, Intervention and Technology, Karolinska University Hospital-Huddinge, Karolinska Institute, Stockholm, Sweden b Division of Clinical Virology, Department of Laboratory Medicine, Karolinska University Hospital-Huddinge, Karolinska Institute, Stockholm, Sweden c Unit of Cancer Epidemiology, Scientific Institute of Public Health, Brussels, Belgium |