[1] Inst Cancerol Gustave Roussy, Radiat Oncol, Villejuif, France
[2] Inst Cancerol Gustave Roussy, Biostat & Epidemiol Unit, Villejuif, France
[3] Inst Gustave Roussy, Radiat Oncol, Villejuif, France
[4] Hosp 12 Octubre, Madrid, Spain
[5] Mt Sinai Med Ctr, New York, NY 10029 USA
[6] Univ Hosp Antwerp, Edegem, Belgium
[7] Hop Bretonneau, Tours, France
[8] Osped SS Giovanni & Paolo, Venice, Italy
[9] Inst Gustave Roussy, Villejuif, France