1. From the Division of Pediatric Gastroenterology, Hepatology, and Nutrition (L.H.G.S., H.S., S.S.) and the Division of Pediatric Infectious Diseases, (M.B., W.B., V.S., J.L.P.), Department of Pediatrics, and the Department of Pathology (D.K.), University of Alabama at Birmingham, Children’s of Alabama (L.H.G.S., H.S., S.S., M.B., D.K.), and Jefferson County Department of Health (S.A.-M., W.G.W.), Birmingham, and the Alabama Department of Public Health, Montgomery (L.A.I., A. Martin) — all in Alabama; the...