Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.|Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden, The Netherlands.|Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.|Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.|Centre for Molecular Medicine Norway, University of Oslo, Oslo, Norway.|Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.