Oncology Clinical Trial Office, Oncology Unit IRCCS Policlinico San Matteo Foundation, Pavia, Italy. Medical Oncology Unit, IRCCS Policlinico San Matteo Foundation, Pavia, Italy. Nutrition and Dietetics Service, IRCCS Policlinico San Matteo Foundation, Pavia, Italy. Oncology and Hematology Department, Oncology Unit, Piacenza General Hospital, Piacenza, Italy. Oncology Unit Hospital "Giovanni Paolo II", Lamezia Terme, CZ, Italy. Oncology Division, San Carlo Borromeo Hospital, ASST Santi Paolo E Carlo, Milan, Italy. Clinical Epidemiology and Biometry Unit, IRCCS Policlinico San Matteo Foundation, Pavia, Italy. Medical Oncology Unit, IRCCS Policlinico San Matteo Foundation, Pavia, Italy. octo@smatteo.pv.it. Univerisity of Pavia, Pavia, Italy. octo@smatteo.pv.it.