1. From Cincinnati Children’s Hospital Medical Center, and the Department of Pediatrics, University of Cincinnati School of Medicine — both in Cincinnati (A.B.); Uganda Heart Institute (E.O., J.R., J.A., P.L., M.N., E.N., I.O.O.), and the Department of Medicine, Makerere University (E.O.) — both in Kampala, Uganda; Children’s National Hospital, Washington, DC (L.C., M. Murali, R.S., C.A.S.); Murdoch Children’s Research Institute (A.G., D.E., A.C.S.), and Melbourne Children’s Global Health, Royal Children’s...