Maintenance work on the ZORA databases is scheduled for Wednesday 22 May 2019 from 20:00-22:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Bredow, Jan; Boese, C K; Werner, C M L; Siewe, J; Löhrer, L; Zarghooni, K; Eysel, P; Scheyerer, M J (2016). Predictive validity of preoperative CT scans and the risk of pedicle screw loosening in spinal surgery. Archives of Orthopaedic and Trauma Surgery, 136(8):1063-1067.