1. From the Departments of Pediatrics, Microbiology, Medicine, and Biostatistics, University of Alabama at Birmingham, Birmingham (R.W., C.A., S.-J.S.); the Department of Pediatrics, Stanford University, Stanford, Calif. (A.A., C.P.); the Department of Medicine, University of Washington, Seattle (S.B., L.C.); the Department of Pediatrics, Ohio State University, Columbus (D.P.); the Department of Pediatrics, University of Pennsylvania, Philadelphia (S.P., S.S.); the Department of Pediatrics, University of...