Andratschke, N;Alheid, H;Allgäuer, M;Becker, G;Blanck, O;Boda-Heggemann, J;Brunner, T;Duma, M;Gerum, S;Guckenberger, M;Hildebrandt, G;Klement, R J;Lewitzki, V;Ostheimer, C;Papachristofilou, A;Petersen, C;Schneider, T;Semrau, R;Wachter, S;Habermehl, D.The SBRT database initiative of the German Society for Radiation Oncology (DEGRO): patterns of care and outcome analysis of stereotactic body radiotherapy (SBRT) for liver oligometastases in 474 patients with 623 metastases..BMC Cancer.2018.18.1.283