Media type: E-Article Title: Letters Contributor: Fürstenberg, Carl Hans; Rupp, Rüdiger; Gerner, Hans Jürgen; Putz, Cornelia imprint: Ovid Technologies (Wolters Kluwer Health), 2009 Published in: Spine Language: English DOI: 10.1097/brs.0b013e3181bac6fe ISSN: 0362-2436 Keywords: Neurology (clinical) ; Orthopedics and Sports Medicine Origination: Footnote: