1 Heart Failure Ealing Community Cardiology, Imperial College NHS Trust, Praed Street, London W2 1NY, UK.
2 Public Health School Department, Imperial College London, The George Institute, Scale Space, London W12 7RZ, UK.
3 Heart Failure Unit, University Hospital Waterford,Waterford X91 ER8E, Ireland.
4 Heart Failure Unit, Mallow General Hospital, Cork University Hospital, College Road, Cork T12 K8AF, Ireland.
5 UK Primary Care Unit, Department of Public Health and Primary Care, University of Cambridge School of Clinical Medicine, East Forvie, Cambridge Biomedical Campus, Cambridge CB2 0SR, UK.
6 KU Leuven Department of Public Health and Primary Care, KU Leuven, Kapucijnenvoer 7 PB7001, 3000 Leuven, Belgium.