Jares, Pedro; L.Fernandez, Pedro; Blay, Maite; Aiza, Gemma; G.Stetler-Stevenson, William; Cardesa, Antonio; Campo, Elias; Jares Pedro; Department of Anatomic Pathology, Hospital Clinic; Department of Basic Medical Sciences, Medical School, University of Lleida; L.Fernandez Pedro; Department of Anatomic Pathology, Hospital Clinic; Blay Maite; Department of Anatomic Pathology, Hospital Clinic; Aiza Gemma; Department of Anatomic Pathology, Hospital Clinic; G.Stetler-Stevenson William; Laboratory of Pathology, National Cancer Institute; Cardesa Antonio; Department of Anatomic Pathology, Hospital Clinic; Campo Elias; Department of Anatomic Pathology, Hospital Clinic; Department of Basic Medical Sciences, Medical School, University of Lleida