1. Department of Tumor Pathology and Pathomorphology, Oncology Centre—Prof. Franciszek Łukaszczyk Memorial Hospital, Department of Tumor Pathology and Pathomorphology, Faculty of Health SciencesNicolaus Copernicus University Collegium Medicum in Bydgoszcz Bydgoszcz Poland
2. Department of PathologyUniversity of Pittsburgh Medical Center, UPMC Cancer Pavilion Pittsburgh Pennsylvania
3. Department of PathologyAlbany Medical College MC‐81 Albany New York
4. Division of Dermatology, Washington University School of Medicine St. Louis Missouri
5. Division of Oncology, Washington University School of Medicine St. Louis Missouri
6. Department of Dermatology, MC‐6230University of Connecticut Health Center Farmington Connecticut
7. Department of DermatologyUniversity of Alabama at Birmingham Birmingham Alabama