Randomised phase I/II study to evaluate carbon ion radiotherapy versus fractionated stereotactic radiotherapy in patients with recurrent or progressive gliomas: The CINDERELLA trial. - Combs, Stephanie E.; Burkholder, Iris; Edler, Lutz; Rieken, Stefan; Habermehl, Daniel; Jäkel, Oliver; Haberer, Thomas; Haselmann, Renate; Unterberg, Andreas; Wick, Wolfgang; Debus, Jürgen (BMC Cancer, 2010)