1. Department of Histopathology Royal Marsden Hospital London UK
2. Department of Oncology University of Turin Turin Italy
3. Institute of Pathology University of Würzburg Würzburg Germany
4. Institute of Pathology and Comprehensive Cancer Centre Tübingen University Hospital Tübingen Germany
5. Department of Pathology NHS Grampian University of Aberdeen NHS Education for Scotland Aberdeen UK
6. Department of Pathology University of Chicago Chicago IL USA
7. Pathology and Cytology Department Centre Hospitalo‐Universitaire de Toulouse Institut Universitaire du Cancer de Toulouse‐Oncopole Centre de Recherche en Cancerologie de Toulouse Inserm UMR1037 laboratoire d’excellence TOUCAN Paul Sabatier University Toulouse III Toulouse France