1. Department of Cardiology and Pneumology; University of Göttingen; Robert-Koch-Str. 40 D-37075 Göttingen Germany
2. Department of Cardiology; University of Graz; Auenbrugger Platz 15 A-8036 Graz Austria
3. Coordination Center for Clinical Trials Leipzig; University of Leipzig; Härtelstr. 16-18 D-04107 Leipzig Germany
4. Department of Clinical Chemistry; University of Göttingen; Robert-Koch-Str. 40 D-37075 Göttingen Germany
5. Department of Psychosomatic Medicine and Psychotherapy; University of Göttingen; von-Siebold-Str. 5 D-37075 Göttingen Germany
6. Department of Preventive and Rehabilitative Sports Medicine; Technical University Munich; Connollystr. 32 D-80809 Munich Germany