1. Institute of Social and Preventive Medicine University of Bern Bern Switzerland
2. Graduate School for Health Sciences University of Bern Bern Switzerland
3. MRC Clinical Trials Unit, Institute of Clinical Trials and Methodology University College London London UK
4. Departments of Health Promotion and Human Behavior and of Clinical Epidemiology Kyoto University Graduate School of Medicine/School of Public Health Kyoto Japan
5. Department of Cardiology, Bern University Hospital University of Bern Bern Switzerland