[1] Med Univ Vienna, Dept Med 1, A-1090 Vienna, Austria
[2] Specialised Hosp St Zoerardus Zobor, Dept Oncol, Nitra, Slovakia
[3] Sir Paul Boffa Hosp, Floriana, Malta
[4] Univ Hosp Bratislava, Dept Oncol, Bratislava, Slovakia
[5] Natl Koranyi Inst TB & Pulmonol, Budapest, Hungary
[6] Charles Univ Prague, Fac Med, Plzen, Czech Republic
[7] Riga Easten Univ Hosp, Riga, Latvia
[8] Paul Stradins Clin Univ Hosp Riga, Radiat & Chemotherapy Ctr, Riga, Latvia
[9] N Estonia Reg Hosp, Ctr Canc, Dept Chemotherapy, Tallinn, Estonia
[10] Univ Hosp, Dept Resp Dis & TB, Brno, Czech Republic
[11] Inst Oncol, Bucharest, Romania
[12] Specialized Hosp Active Treatment Oncol, Sofia, Bulgaria
[13] ISUL, Univ Hosp Queen Joanna, Clin Chemotherapy, Sofia, Bulgaria
[14] Inst Oncol Ljubljana, Div Med Oncol, Ljubljana, Slovenia
[15] Inst Oncol Ljubljana, Dept Radiat Oncol, Ljubljana, Slovenia