1. Emory University School of Medicine, Atlanta, GA (G.P.L.).
2. The Ohio State University, Columbus (L.S.M.).
3. Rush University Medical Center, Chicago, IL (R.M.S., H.N.P., N.T.A., L.T.B., A.S.V.).
4. University of Wisconsin, Madison (N.R.A.).
5. Oregon Clinic Cardiology, Portland (S.J.L.).
6. Hofstra Northwell School of Medicine, Hempstead, NY (J.H.M.).
7. Harvard Medical School, Boston, MA (M.J.W.).
8. Stanford University, Stanford, CA (R.A.H.).