1. Clinic for Orthopedics and Trauma Surgery, Center for Orthopedics, Trauma Surgery and Spinal Cord InjuryHeidelberg University Hospital Heidelberg Germany
2. Department of Internal Medicine IKlinikum Saarbrücken Saarbrücken Germany
3. Department of Medical Psychology and Medical SociologyUniversität Leipzig Leipzig Germany
4. Department of Psychosomatic Medicine and PsychotherapyUniversal Medical Center Mainz Mainz Germany