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1 Huntsville Regional Medical Campus, University of Alabama Birmingham School of Medicine, Birmingham, Alabama (R.M.C.).
2 Perelman School of Medicine and Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania, and Regenstrief Institute, Indianapolis, Indiana (N.C.A.).
3 Heritage Medical Associates, Nashville, Tennessee (R.D.M.).
1 Huntsville Regional Medical Campus, University of Alabama Birmingham School of Medicine, Birmingham, Alabama (R.M.C.).
2 Perelman School of Medicine and Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania, and Regenstrief Institute, Indianapolis, Indiana (N.C.A.).
3 Heritage Medical Associates, Nashville, Tennessee (R.D.M.).