1. Cancer Research UK Institute for Cancer Studies, University of Birmingham, Birmingham, United Kingdom;
2. Krankenhaus St Joseph-Stift Bremen, Bremen, Germany;
3. Birmingham Children's Hospital, Birmingham, United Kingdom;
4. Pathological Institute, University Hospital Erlangen, Erlangen, Germany; and
5. Institute for Pathology, Sana Klinikum Lichtenberg/Unfallkrankenhaus Berlin, Berlin, Germany