1. Institute of Pathology; University Hospital of Cologne; Cologne Germany
2. Department of Pathology; Case Western Reserve University/University Hospitals Cleveland Health Center; Cleveland Ohio
3. Department of Laboratory Medicine; Karolinska Institutet; Stockholm Sweden
4. Department of Medicine; Surgical Pathology & Cytopathology Unit; University of Padova; Padova Italy
5. Department of Pathology; Koc University School of Medicine; Istanbul Turkey