Patient informed consent is mandatory and required for all patients prior to their inclusion in the study. The process of obtaining informed consent complies with the Declaration of Helsinki and applicable national regulations, and uses language that is understandable to the patient. The informed consent form is constructed in accordance with rules given by Area Vasta Romagna Ethic Committee.The form is signed in double original, and one is given to patient, the second original kept in patients' file. The informed consent covers the use of personal information in an anonymous form and only for scientific purposes, and the acceptation of fluoroscopy as a means of clinical investigation. Patients can modify their decision at any moment, and nothing will be changed in their care and clinical programs.