1. Professor of Research in General Practice, Department of General Practice, University of Wales College of Medicine, Health Centre, Cardiff, Wales,
2. Research Nurse, Department of General Practice, University of Wales College of Medicine, Health Centre, Cardiff, Wales,
3. Professor and Head of Department of General Practice, University of Wales College of Medicine, Health Centre, Cardiff, Wales,
4. Senior Lecturer, Department of General Practice, University of Wales College of Medicine, Health Centre, Cardiff, Wales