1 Institute for Medical Epidemiology, Biometrics and Informatics (IMEBI), Interdisciplinary Center for Health Sciences, Medical School of the Martin-Luther-University Halle-Wittenberg, Magdeburger Str. 8, 06112, Halle (Saale), Germany.
2 Department of Radiation Oncology, Martin-Luther-University, Halle (Saale), Germany.
3 Institute for Medical Epidemiology, Biometrics and Informatics (IMEBI), Interdisciplinary Center for Health Sciences, Medical School of the Martin-Luther-University Halle-Wittenberg, Magdeburger Str. 8, 06112, Halle (Saale), Germany. Daniel.Medenwald@uk-halle.de.
4 Department of Radiation Oncology, Martin-Luther-University, Halle (Saale), Germany. Daniel.Medenwald@uk-halle.de.