1 From Department of Cardiology, St. Thomas' Hospital, London, United Kingdom (B.D.P.); and Department of Cardiac Surgery, Vita-Salute San Raffaele University, IRCCS San Raffaele Hospital, Milan, Italy (M.D.B.). bernard.prendergast@gstt.nhs.uk.
2 From Department of Cardiology, St. Thomas' Hospital, London, United Kingdom (B.D.P.); and Department of Cardiac Surgery, Vita-Salute San Raffaele University, IRCCS San Raffaele Hospital, Milan, Italy (M.D.B.).