1. Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, United Kingdom (Y.X.G., G.Y.H.L.).
2. School of Life and Medical Sciences, Postgraduate Medical School, University of Hertfordshire, United Kingdom (D.A.G.).
3. Faculty of Medicine, National Heart and Lung Institute, Imperial College, London, United Kingdom (D.A.G.).
4. Department of Clinical Medicine, Aalborg University, Denmark (G.Y.H.L.).