1. Department of Internal Medicine, College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Canada.
2. Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Canada.
3. Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK.
4. Division of Women's and Children's Health, Women's Health Academic Centre, King's College London, London, UK.
5. Norwich Medical School, University of East Anglia, Norwich, UK.