Institution: | a Department of Pediatrics, St. Elisabeth Hospital, Post-office Box 90151, 5000 LC, Tilburg, The Netherlands b Department of Pediatric Infectious Diseases Immunology and Rheumatology, VU Medical Centre, Post-office Box 7057, 1007 MB, Amsterdam, The Netherlands c Department of Virology, Eijkman-Winkler Center, University Medical Center Utrecht, Post-office Box 85500, 3508 CX, Utrecht, The Netherlands d Laboratory of Medical Microbiology and Immunology, St. Elisabeth Hospital, Post-office Box 90151, 5000 LC, Tilburg, The Netherlands |