[1] Univ Grenoble 1, INSERM U823, Lung Tumor Res Grp, F-38026 Grenoble, France
[2] Inst Gustave Roussy, Dept Med, F-94800 Villejuif, France
[3] Inst Gustave Roussy, Biostat & Epidemiol Unit, F-94800 Villejuif, France
[4] Univ Grenoble 1, INSERM U823, F-38041 Grenoble, France
[5] Univ Med Vienna, Dept Internal Med, Vienna, Austria
[6] Graz Univ, Sch Med, Inst Pathol, A-8010 Graz, Austria