[1] Univ Hosp, Patras Med Sch, Dept Med, Div Oncol, Rion 26504, Greece
[2] Univ Hosp Attikon, Dept Internal Med 2, Propaedeut Oncol Sect, Athens 15342, Greece
[3] Hygeia Hosp, Dept Oncol 2, Athens 15123, Greece
[4] Henry Dunant Hosp, Dept Oncol 2, Athens 11526, Greece
[5] Univ Athens, Laikon Hosp, Dept Med Oncol 3, Athens 11527, Greece
[6] IKA Hosp, Dept Oncol, Thessaloniki 55132, Greece
[7] Aristotle Univ Thessaloniki, Sch Med, Papageorgiou Hosp, Dept Med Oncol, Thessaloniki 56403, Greece
[8] Hippokrateion Hosp, Dept Oncol, Athens 11527, Greece
[9] Univ Hosp, Patras Med Sch, Dept Med, Patras 26504, Greece