[1] Univ Wurzburg, Fac Med, Dept Radiat Oncol, Wurzburg, Germany
[2] Sulaimani Unvivers, Coll Sci, Dept Biol, Sulaimani Kurdistan Regi, Iraq
[3] Univ Wurzburg, Fac Med, Dept Neurosurg, Tumor Biol Lab, Wurzburg, Germany
[4] Univ Halle Wittenberg, Fac Med, Dept Radiat Oncol, Wurzburg, Germany