1. Applied Research Group in Emergency Cardiovascular Care, Coventry University, Coventry, CV1 5FB;
2. National Primary Care Research and Development Centre, University of Manchester, Manchester, M13 9PL;
3. Liverpool Reviews, Implementation Group, University of Liverpool, L69 3BX;
4. Skills for Health, Broad Plain, Bristol, BS2 0JP;
5. School of Health Sciences, University of Birmingham, Birmingham, B15 2TT.