Hansen-Algenstaedt Nils, Knight Reginald, Beyerlein Jörg, Gessler Roland, Wiesner Lothar, Schaefer Christian
Department of Orthopaedics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany,
Eur Spine J. 2013 Sep;22(9):2142-4. doi: 10.1007/s00586-013-2959-2.