[1] Inst Jean Godinot, Dept Radiotherapie, F-51100 Reims, France
[2] Ctr Val Aurelle Paul Lamarque, F-34298 Montpellier 5, France
[3] CHU Grenoble, Dept Cancerol Hematol, F-38000 Grenoble, France
[4] Dr B Verbeteen Inst, Dept Radiat Oncol, Tilburg, Netherlands
[5] Mayo Clin & Mayo Fdn, Dept Radiat Oncol, Rochester, MN 55905 USA