Spinal bone metastases in colorectal cancer: a retrospective analysis of stability, prognostic factors and survival after palliative radiotherapy - Bostel, Tilman; Förster, Robert; Schlampp, Ingmar; Sprave, Tetyana; Bruckner, Thomas; Nicolay, Nils; Welte, Stefan Ezechiel; Debus, Jürgen; Rief, Harald (BioMed Central, 2017)