[1] Inst Gustave Roussy, Biostat Dept, Villejuif, France
[2] Jefferson Univ, Dept Radiat, Philadelphia, PA USA
[3] Osaka Cent Hosp, Div Resp Dis, Osaka, Japan
[4] N Hosp, Dept Pneumol, St Etinne, France
[5] Netherlands Canc Inst, Dept Radiat Oncol, Amsterdam, Netherlands
[6] Univ Iowa, Coll Med, Dept Internal Med, Iowa City, IA USA
[7] GATA Radiat Oncol Dept, Ankara, Turkey
[8] MRC Clin Trial Unit, Metaanal Grp, London, England
[9] Inst Gustave Roussy, Radiotherapy Dept, Villejuif, France