1 Division of Biostatistics, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 581, 69120, Heidelberg, Germany. m.wiesenfarth@dkfz-heidelberg.de.
2 Division of Computer Assisted Medical Interventions (CAMI), German Cancer Research Center (DKFZ), Im Neuenheimer Feld 223, 69120, Heidelberg, Germany.
3 Electrical Engineering, Vanderbilt University, Nashville, TN, 37235-1679, USA.
4 School of Biomedical Engineering and Imaging Sciences, King's College London, London, WC2R 2LS, UK.
5 Division of Computer Assisted Medical Interventions (CAMI), German Cancer Research Center (DKFZ), Im Neuenheimer Feld 223, 69120, Heidelberg, Germany. l.maier-hein@dkfz-heidelberg.de.
6 Division of Biostatistics, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 581, 69120, Heidelberg, Germany.