1 British Heart Foundation Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK; West of Scotland Heart and Lung Centre, Golden Jubilee National Hospital, Clydebank, UK.
2 British Heart Foundation Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK; West of Scotland Heart and Lung Centre, Golden Jubilee National Hospital, Clydebank, UK. Electronic address: [email protected].