1. Department of General Surgery; Clínica Universidad de Navarra; Navarra Spain
2. Department of General Surgery; Division of Colorectal Surgery; Fundación Jiménez-Díaz; Universidad Autónoma de Madrid; Madrid Spain
3. Department of Medical Oncology; Clínica Universidad de Navarra; Navarra Spain
4. Department of Radiology; Clínica Universidad de Navarra; Navarra Spain
5. Department of Nuclear Medicine; Clínica Universidad de Navarra; Navarra Spain