1 Division of Cardiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA; Baim Institute for Clinical Research, Brookline, Massachusetts, USA.
2 University of Galway School of Medicine and National Institute for Prevention and Cardiovascular Health, Moyola Lane, Newcastle, Galway, Ireland.
3 Division of Cardiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA; Baim Institute for Clinical Research, Brookline, Massachusetts, USA. Electronic address: jjanuzzi@mgb.org.