1 Mid America Heart Institute at Saint Luke's Hospital, Kansas City, Mo.
2 Department of Family and Social Medicine, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY.
3 John Ochsner Heart and Vascular Institute, Ochsner Clinical School-The University of Queensland School of Medicine, New Orleans, La; Pennington Biomedical Research Center, Baton Rouge, La.
4 Mid America Heart Institute at Saint Luke's Hospital, Kansas City, Mo; University of Missouri-Kansas City, Kansas City, Mo.