Dahele, M., Slotman, B., & Verbakel, W. (2016). Stereotactic body radiotherapy for spine and bony pelvis using flattening filter free volumetric modulated arc therapy, 6D cone-beam CT and simple positioning techniques: Treatment time and patient stability. Acta Oncologica, 55(6), 795–798. https://doi.org/10.3109/0284186X.2015.1119885