Institution: | 1. Department of Pathology, Medical Center Alkmaar, Wilhelminalaan 12, 1815 JD, Alkmaar, The Netherlands 2. Department of Cell Biology and Histology, Medical Faculty, University of Nijmegen, P.O. box 9101, 6500 HB, Nijmegen, The Netherlands 3. Department of Immunopathology, National Institute of Public Health and Environmental Hygiene, P.O. box 1, 3720 BA, Bilthoven, The Netherlands
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