1. Department of Cardiology and Pneumology University Medical Centre Göttingen Göttingen Germany
2. Wandsworth Medical Centre London UK
3. Department of Behavioural Science and Health University College London London UK
4. Department of Oral and Maxillofacial Surgery University Medical Centre Goettingen Göttingen Germany
5. Department of Preventive Dentistry, Periodontology and Cariology University Medical Centre Göttingen Göttingen Germany
6. Division of Medical Education Research and Curriculum Development University Medical Centre Göttingen Göttingen Germany