Martin P Eccles1
, Gillian Hawthorne2
, Marie Johnston3
, Margaret Hunter1
, Nick Steen1
, Jill Francis4
, Susan Hrisos1
, Marko Elovainio5
and Jeremy M Grimshaw6,7 
1
Institute of Health and Society, University of Newcastle upon Tyne, 21 Claremont Place, Newcastle upon Tyne, NE2 4AA, UK
2
Newcastle Diabetes Centre, Newcastle General Hospital, Westgate Road, Newcastle upon Tyne, NE4 6BE, UK
3
College of Life Sciences and Medicine, University of Aberdeen, Polwarth Building, Foresterhill, Aberdeen, AB25 2ZD, UK
4
Health Services Research Unit, University of Aberdeen, Health Sciences Building, Foresterhill, Aberdeen, AB25 2ZD, UK
5
National Institute for Health and Welfare, Mannerheimintie 166, Helsinki, Finland
6
Ottawa Health Research Institute, 1053 Carling Avenue, Room 2-017, Admin Building, Ottawa, ON K1Y 4E9, Canada
7
Department of Medicine, University of Ottawa, Ontario, Canada, K1H 8M5