[1] University of Milan,Division of Gastroenterology, Department of Internal Medicine, Istituto Clinico Humanitas
[2] Istituto Clinico Humanitas,Magnetic Resonance Unit
[3] Istituto Clinico Humanitas,Nuclear Medicine
[4] European Institute of Oncology,Institute of Radiological Sciences, University of Milan and Unit of Molecular Imaging, Department of Radiation Oncology