1. University of Oxford; Nuffield 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; St Dunstan's Road London UK W6 8RP
3. Imperial College & Nanyang Technological University; Lee Kong Chian School of Medicine; 3 Fusionopolis Link, #03-08 Nexus@one-north Singapore Singapore 138543
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