1 Center for Esophageal Diseases and Swallowing, Division of Gastroenterology and Hepatology, University of North Carolina School of Medicine, Chapel Hill, North Carolina.
2 Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, and, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
3 Gastrointestinal Eosinophilic Diseases Program, and, Mucosal Inflammation Program, Department of Pediatrics, University of Colorado School of Medicine, and, Digestive Health Institute, Children's Hospital Colorado, Aurora, Colorado.
4 Division of Allergy, Immunology, University of California, San Diego, California; Rady Children's Hospital, San Diego, California.