1 Cardiovascular Research, Saint Luke's Mid America Heart Institute, Kansas City, MO, USA.
2 Department of Biomedical and Health Informatics, University of Missouri-Kansas City, Kansas City, MO, USA.
3 Department of Cardiovascular Surgery, Marcus Valve Center, Piedmont Heart Institute, 95 Collier Road Northwest, Suite 5015 Atlanta, GA 30309, USA.
4 Department of Internal Medicine, Division of Cardiology, Ahmanson-UCLA Cardiomyopathy Center, Ronald Reagan UCLA Medical Center, Los Angeles, CA, USA.
5 Division of Cardiology, Department of Medicine, Stanford University, Stanford, CA, USA.