1. Division of Population Medicine, School of Medicine, Cardiff University, Cardiff, UK
2. London School of Hygiene & Tropical Medicine, London, UK
3. Marie Curie Research Centre, Division of Population Medicine, School of Medicine, Cardiff University, Cardiff, UK
4. Centre for Healthcare Resilience and Implementation Science, Australian Institute of Health Innovation, Macquarie University, North Ryde, NSW, Australia
5. University of South Wales, Pontypridd, UK
6. Department of Family Practice, University of British Columbia, Vancouver, BC, Canada