[1] University of Glasgow, Glasgow
[2] Department of Cardiology, Queen Elizabeth University Hospital, Glasgow
[3] Department of Cardiology, Glasgow Royal Infirmary, Glasgow
[4] Department of Cardiology, Aberdeen Royal Infirmary, Aberdeen
[5] Pharmacy Services, NHS Greater Glasgow and Clyde, Glasgow
[6] Scottish Adult Congenital Cardiac Service, Golden Jubilee National Hospital, Clydebank
[7] Cardiology Department, University of Aberdeen, Aberdeen