Portsmouth Hospitals University NHS Trust, Portsmouth, United Kingdom
Julia Grapsa, MD, PhD
Cardiology Department, Guys and St Thomas NHS Hospitals, London, United Kingdom; Address for correspondence: Dr. Julia Grapsa, Cardiology Department, Guys and St Thomas NHS Trust, Westminster Bridge Road, London SE1 7EH, United Kingdom.
Mary Norine Walsh, MD
St. Vincent Heart Center, Indianapolis, Indiana, USA