[1] VBG Bezirksverwaltung Erfurt, Koenbergkstr 1, D-99084 Erfurt, Germany
[2] VBG Hauptverwaltung Rehabil Stab, Hamburg, Germany
[3] Sport & Rehactr, Magdeburg, Germany
[4] Univ Greifswald, Inst Community Med, Abt Methoden Community Med, Greifswald, Germany
[5] M&I Fachklin, Abt Orthopadie Unfallchirurg, Bad Liebenstein, Germany