1. From the Department of History of Medicine (A.W., J.A.G.), the Department of Medicine (J.A.G.), and the Department of Pediatrics (R.L.J.T.), Johns Hopkins University School of Medicine, the Department of Sociology, Johns Hopkins University Krieger School of Arts and Sciences (A.W.), and the Department of Health, Society, and Behavior, Johns Hopkins Bloomberg School of Public Health (R.L.J.T.) — all in Baltimore.