1. Institut für Herzinfarktforschung Ludwigshafen, Germany
2. Cardiovascular Research Laboratory, Biomedical Research Foundation, Academy of Athens, Greece
3. Department of Health Sciences, University of York, UK
4. Institute of Medical Biometry and Informatics (IMBI), University of Heidelberg, Germany
5. Cochrane Metabolic and Endocrine Disorders Group, Institute of General Practice, University of Düsseldorf, Germany
6. Centre of Rehabilitation Research, University of Potsdam, Germany
7. Department of Cardiology Spital Tiefenau, Switzerland