1. Department of Medicine, Columbia University Medical Center, New York, NY (E.A.H., G.T.H., B.M.S., R.G.B.).
2. University of Iowa, Iowa City (A.M., E.A.H., A.E., S.E.G., J.G., D.W.K., P.N.).
3. Northwestern University, Evanston, IL (N.A., S.S.).
4. Wake Forest School of Medicine, Winston-Salem, NC (A.G.B.).
5. University of Wisconsin-Madison (D.A.B., P.N.).
6. Johns Hopkins University, Baltimore, MD (E.D.M.).
7. University of Minnesota, Minneapolis (J.P.).
8. University of Washington, Seattle (K.H.S.).
9. Department of Biostatistics, Mailman School of Public Health, Columbia University Medical Center, New York (Y.S.).
10. University of California, Los Angeles (K.W.).
11. Department of Epidemiology, Mailman School of Public Health, Columbia University Medical Center, New York (R.G.B.).