1. Staff Nurse, St George's Hospital, Blackshaw Road, London SW17 0QT, UK
2. Professor of Nursing, Faculty of Health, 103 Borough Road, London SE1 0AA, UK
3. Lecturer, Department of Nursing Studies, King's College, London. Cornwall House London SE1 8WA, UK
4. Clinical Nurse Specialist, King's Healthcare NHS Trust, Dulwich Hospital, London SE22 8PT, UK