[1] Univ Groningen, Univ Med Ctr Groningen, Radiat Oncol, Groningen, Netherlands
[2] Univ Groningen, Univ Med Ctr Groningen, Dept Cell Biol, Groningen, Netherlands
[3] Univ Groningen, Univ Med Ctr Groningen, Sect Radiat Stress Cell, Groningen, Netherlands
[4] Paul Scherrer Inst, Accelerator Dept, Villigen, Switzerland
[5] Kernfys Versneller Inst, Accelerator Dept, Groningen, Netherlands