1 Division of Cardiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois.
2 Deputy Editor, JAMA Cardiology.
3 Division of Cardiology, Duke University School of Medicine, Durham, North Carolina.
4 Associate Editor, JAMA Cardiology.
5 Ahmanson-UCLA Cardiomyopathy Center, Ronald Reagan UCLA Medical Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles.