1. From the Divisions of Allergy and Immunology (M.E.R., J.M.C.) and Pathology and Laboratory Medicine (M.H.C.), Department of Pediatrics, and the Department of Pathology and Laboratory Medicine (M.H.C.), University of Cincinnati College of Medicine, Cincinnati Children’s Hospital Medical Center, Cincinnati; the Center for Esophageal Diseases and Swallowing, Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill (E.S.D.); the Department...