1. Senior Research Associate, Centre for Health Services Research, University of Newcastle upon Tyne, Newcastle upon Tyne, England,
2. Senior Research Associate, Centre for Health Services Research, University of Newcastle upon Tyne, England,
3. Reader, Centre for Evidence‐Based Nursing, Department of Health Studies, University of York, York,
4. Research Associate, Centre for Health Services Research, University of Newcastle upon Tyne,
5. Research Associate, Centre for Health Services Research, University of Newcastle upon Tyne