Risk-benefit evaluation for additional anterior stabilization in unstable thoracolumbar metastases - M. Lenschow; M. Lenz; S. Telentschak; N. von Spreckelsen; S. Krishnan; S. Oikonomidis; N. Kernich; S.G. Walter; M. Perrech; P. Eysel; R. Goldbrunner; V. Neuschmelting (Brain and Spine)