1. Oxford University; Department of Primary Care Health Sciences; Radcliffe Observatory Quarter Woodstock Road Oxford UK OX2 6GG
2. Imperial College London; Department of Primary Care and Public Health; Reynolds Building London UK W6 8RP
3. The University of Edinburgh; Centre for Population Health Sciences; Medical School Doorway 3, Teviot Place Edinburgh UK EH8 9AG
4. Imperial College London; Global eHealth Unit, Department of Primary Care and Public Health, School of Public Health; Reynolds Building St Dunstans Road London UK W6 8RP
5. University of Ljubljana; Department of Family Medicine, Faculty of Medicine; Ljubljana Slovenia