1. HRB Centre for Primary Care Research, Department of General Practice, RCSI Medical School, Dublin, Ireland
2. Warwick Primary Care, Warwick Medical School, The University of Warwick, Coventry, UK
3. Primary Care Research Unit, Department of General Practice, University of Melbourne, Melbourne, Victoria, Australia
4. Nuffield Department of Primary Care Health Sciences, Oxford University, Oxford, UK
5. Department of Family Medicine and Emergency Medicine, Université de Sherbrooke, Sherbrooke, Quebec, Canada; and Centre intégré universitaire de santé et de services sociaux du Saguenay-Lac-St-Jean, Quebec, Canada
6. General Practice and Primary Care, Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
7. Department of Family Medicine, School of Public Health and Primary Care (CAPHRI), Maastricht University, Maastricht, The Netherlands; and Department of General Practice, KU Leuven, Leuven, Belgium
8. Keele University Institute for Primary Care and Health Sciences, Keele, Staffordshire, UK