1 Division of Cardiology (M.M.), Department of Medicine, South West Acute Hospital, Western Health and Social Care Trust, Enniskillen, United Kingdom.
2 Royal College of Surgeons in Ireland, St Stephen's Green, Dublin, Ireland (M.M.).
3 Division of Acute Medicine (S.S.), Department of Medicine, South West Acute Hospital, Western Health and Social Care Trust, Enniskillen, United Kingdom.
4 School of Medicine, Dentistry, and Biomedical Sciences, Queen's University, Belfast, United Kingdom (S.S.).