1. Cardiovascular Clinical Research Facility, Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford , Oxford OX3 9DU , UK
2. Healthcare Engineering Innovation Center (HEIC), Department of Biomedical Engineering, Khalifa University , Shakhbout Bin Sultan St., Hadbat Al Za'faranah - Zone 1, P.O. Box 127788, Abu Dhabi , UAE