1. Department of Cellular Pathology Queen Elizabeth Hospital Birmingham Birmingham UK
2. Institute of Immunology and Immunotherapy University of Birmingham Birmingham UK
3. Division of Transplant Pathology University of Pittsburgh Medical Centre Pittsburgh Pennsylvania USA
4. Department of Pathology and Laboratory Medicine Mayo Clinic Arizona Scottsdale Arizona USA
5. Department of Pathology and Immunology Washington University School of Medicine St Louis Missouri USA
6. Division of Liver and Transplantation Pathology University of Pittsburgh Pittsburgh Pennsylvania USA