[1] Chiang Mai Univ, Dept Med, Chiang Mai, Thailand
[2] Washington Univ, Sch Med, Dept Oncol, St Louis, MO 63130 USA
[3] Koranyi Natl Inst Pulmonol, Dept Bronchol, Budapest, Hungary
[4] Moscow City Clin Hosp Oncol, Dept Chemotherapy, Moscow, Russia
[5] Univ Turin, Dept Clin & Biol Sci, I-10124 Turin, Italy