Institution: | 1. Department of Medical Genetics, University Medical Center Utrecht, Utrecht, The Netherlands;2. Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands;3. Department of Obstetrics, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands;4. Laboratory for Infectious Diseases and Screening, National Institute for Public Health and the Environment, Bilthoven, The Netherlands |