1. Radboud University Nijmegen Medical Centre; Scientific Institute for Quality of Healthcare (IQ healthcare); PO Box 9101 Nijmegen Netherlands 6500 HB
2. Norwegian Knowledge Centre for the Health Services; Box 7004, St. Olavs plass Oslo Norway
3. University of Bergen; Department of Public Health and Primary Health Care; Bergen Norway
4. University of East Anglia; Edith Cavell Building; Colney Lane Norwich UK NR4 7TJ
5. Newcastle University; Institute of Health and Society; Badiley Clark Building Richardson Road Newcastle upon Tyne UK NE2 4AX