1. Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7AL, UK
2. Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, the Second Hospital of Tianjin Medical University, Tianjin, China
3. Physiological Laboratory, University of Cambridge, Cambridge, CB2 1QW, UK
4. Rossdales Equine Hospital and Diagnostic Centre, Exning, CB8 7NN, Suffolk, UK