Muthiah Vaduganathan1, Deepak L Bhatt2. 1. Brigham and Women's Hospital Heart & Vascular Center and Harvard Medical School, 75 Francis St, Boston, MA 02115, USA. 2. Brigham and Women's Hospital Heart & Vascular Center and Harvard Medical School, 75 Francis St, Boston, MA 02115, USA dlbhattmd@post.harvard.edu.