1. Institute for Technology Assessment and Department of Radiology; Massachusetts General Hospital, Harvard Medical School; Boston USA
2. Division of Cardiology, Charité Campus Virchow-Klinikum; Berlin Germany
3. Department for Public Health, Medical Decision Making and Health Technology Assessment; University for Health Science, Medical Informatics and Technology, Hall i.T.; Austria
4. Department of Health Policy and Management; Harvard School of Public Health; Boston USA