1. Division of Population Medicine; School of Medicine; Cardiff University; Cardiff UK
2. Nuffield department of Primary Care Health Sciences; Medical School Division; Oxford University; Cardiff UK
3. University of Western Australia; Cardiff UK
4. Department of Primary and Interdisciplinary care; Faculty of Medicine and Health Sciences; University of Antwerp; Wilrijik Belgium
5. Centre for Family and Community Medicine; Faculty of Medical Sciences; Medical University of Lodz; Lodz Poland
6. Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol); Barcelona Spain
7. University College Dublin School of Medicine; Dublin Ireland
8. Centre for Trials Research; Cardiff University; Cardiff UK
9. HRB funded Irish Critical Care-Clinical Research Core; University College Dublin School of Medicine; Dublin Ireland