Fiona Campbell BSc (Hons), MD, FRCPathDepartment of PathologyRoyal Liverpool University HospitalPrescot StreetLiverpool, UK Caroline S. Verbeke MD PhD FRCPathUniversity of OsloOslo University HospitalSognsvannsveien 20NorwayDr. René P. MICHELProfessor, Dept. of Pathology, McGill UniversityMcGill University Health Center1001 Decarie BoulevardDepartment of PathologyMontreal, QC, Canada Dr Priyanthi KumarasingheProfessor of Clinical Pathology and Consultant PathologistDepartment of Anatomical PathologyPathWest, QE II Medical CentreHospital AvenueNedlands, Perth