1. Department of Pathology; Memorial Sloan Kettering Cancer Center; New York NY USA
2. Division of Pathology; Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico; Milan Italy
3. Instituto Português de Oncologia; Oporto Portugal
4. Department of Pathology; Robert J Tomsich Pathology and Laboratory Medicine Institute; Cleveland Clinic; Cleveland OH USA
5. Department of Pathology; Medical Faculty of Charles University; Plzen Czech Republic
6. Department of Pathology; University Health Network; Toronto Ontario Canada