[1] Metropolitan Hosp, Oncol Dept 4, Athens, Greece
[2] Metropolitan Hosp, Comprehens Clin Trials Ctr, Athens, Greece
[3] Natl & Kapodistrian Univ Athens, Sotiria Hosp Dis Chest, Dept Med 3, Oncol Unit, Athens, Greece
[4] Natl & Kapodistrian Univ Athens, Attikon Univ Hosp, Dept Internal Med 4, Hematol Oncol Unit, Haidari, Greece
[5] Henry Dunant Hosp Ctr, Dept Med Oncol 4, Athens, Greece
[6] Henry Dunant Hosp Ctr, Clin Trials Unit, Athens, Greece
[7] Hygeia Hosp, Dept Med Oncol 2, Maroussi, Greece
[8] Metropolitan Hosp, Dept Med Oncol 2, Athens, Greece
[9] Univ Gen Hosp Herakl, Dept Med Oncol, Iraklion, Greece
[10] St Andrew Hosp, Med Oncol Unit, Patras, Greece
[11] St Lukes Hosp, Dept Oncol, Agios Loukas Clin, Thessaloniki, Greece
[12] Interbalkan European Med Ctr, Dept Oncol, Thessaloniki, Greece
[13] Evangelismos Gen Hosp Athens, Athens, Greece
[14] Mitera Hosp, Dept Med Oncol, Maroussi, Greece
[15] Univ Hosp Patras, Dept Med, Div Oncol, Patras, Greece
[16] Univ Hosp Ioannina, Dept Med Oncol, Ioannina, Greece
[17] Univ Hosp Larissa, Dept Med Oncol, Larisa, Greece
[18] Natl & Kapodistrian Univ Athens, Sch Med, Dept Med 1, Athens, Greece
[19] MSD Greece, Athens, Greece