1 1 Department of Cellular Pathology, Cardiff and Vale University Health Board, and Cardiff University, University Hospital of Wales, Cardiff, United Kingdom.
2 2 Department of Pathology and Laboratory Medicine, University of British Columbia, and Vancouver General Hospital, Vancouver, British Columbia, Canada.
3 3 Department of Biopathology, Léon-Bérard Cancer Centre, Lyon, France.
4 4 Department of Cellular Pathology, Cardiff and Vale University Health Board, Cardiff, United Kingdom.
5 5 Department of Pathology, Duke University Medical Center, Durham, North Carolina.