Dorothy L. Rosenthal, MD Professor of Pathology, Oncology & Gynecology/Obstetrics, The Johns Hopkins University, The Johns Hopkins Hospital, Department of Pathology/Cytopathology, Baltimore, MD, USAEva M. Wojcik, MD Chair of Pathology, Helen M. and Raymond M. Galvin Professor Pathology & Urology, Loyola University Medical Center, Department of Pathology, Maywood, IL, USADaniel F. I. Kurtycz, MD Medical Director, Wisconsin State Laboratory of Hygiene Professor, University of Wisconsin Hospitals & Clinics, Department of Pathology and Laboratory Medicine, Madison WI, USA