1. From the Department of Medical Oncology and Pathology of Bellaria Hospital, Bologna; Department of Medical Oncology, Istituto Oncologico Veneto; Servizio Immunologia e Diagnostica Molecolare Oncologica, Istituto Oncologico Veneto; Pathology, Neurological Sciences, Azienda Ospedale-Università of Padova, Padova; Department of Oncology, San Raffaele Hospital, Milan; Department of Pathology Verona Hospital, Verona; and the Department of Pathology, Belluno Hospital, Belluno, Italy