1Department of Cardiology and Pneumology, University of Goettingen, 37075 Goettingen, Germany
2Coordination Center for Clinical Trials, University of Leipzig, Leipzig, Germany
3Department of Cardiology, Medical University Graz, Graz, Austria
4Department of Cardiology, Charité-Universitätsmedizin Berlin, Berlin, Germany
5Department of General Practice, University of Goettingen, Goettingen, Germany
6Institute of Social Medicine, University of Luebeck, Luebeck, Germany
7Department of Clinical Chemistry, University of Goettingen, Goettingen, Germany
8Department of Psychosomatic Medicine, University of Goettingen, Goettingen, Germany