1. Institute of Pathology, and Comprehensive Cancer Center (CCC), Eberhard-Karls-University of Tübingen, Tübingen, Germany
2. Departments of Pathology, Leiden University Medical Center, Leiden, The Netherlands
3. Department of Pathology, University of Texas Health Science Center at San Antonio
4. Division of Hematopathology, Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA
5. Dermatology, Leiden University Medical Center, Leiden, The Netherlands