Daan Pieren

112 Chapter 4 Joyce Greeber, Ronald Jacobi, Roos van Schuijlenburg, and Marion Hendriks for sample processing and assisting with sample selection. We thank Sara van den Berg and Marjan Bogaard-van Maurik for performing and interpreting CMV serology assays. We thank Jeroen Hoeboer, Maarten Emmelot, Willem van Eden (Utrecht University), and the Center for Immunology of Infectious Diseases and Vaccines (RIVM) for useful discussions. This study was supported by the Dutch Ministry of Health, Welfare and Sport.