1. Centers for Disease Control and Prevention, Atlanta, Georgia, and Weill Cornell Medicine and NewYork–Presbyterian Hospital, New York, New York (N.H.)
2. Centers for Disease Control and Prevention, Atlanta, Georgia (M.P., R.M.T., W.A.B., K.H.)
3. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, George Washington University, Washington, DC, and Inova Fairfax Hospital, Falls Church, Virginia (D.H.)