[1] Mons R Dimiccoli Hosp, Div Oncol, I-76121 Barletta Bt, Asl Bat, Italy
[2] Ist Tumori Giovanni Paolo II, Natl Canc Res Ctr, Clin Pathol Lab, I-70100 Bari, Italy
[3] Univ Bari, Sch Med, Interdisciplinary Dept Med, I-70124 Bari, Italy
[4] IRCCS Saverio De Bellis, Natl Inst Digest Dis, I-70013 Bari, Italy
[5] S Francesco di Paola Hosp, Div Oncol, I-87027 Paola Cs, ASP, Italy
[6] Univ Roma La Sapienza, Policlin Umberto 1, Dept Internal Med & Clin Specialties, I-00161 Rome, Italy