1 Center for Pediatric Eosinophilic Diseases, Division of Allergy-Immunology, The Children's Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania. Electronic address: spergel@email.chop.edu.
2 Center for Esophageal Diseases and Swallowing, Division of Gastroenterology and Hepatology, University of North Carolina School of Medicine, Chapel Hill, North Carolina.
3 Center for Pediatric Eosinophilic Diseases, Division of Gastroenterology and Hepatology and Nutrition, Children's Hospital of Philadelphia, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania.
4 Division of Gastroenterology and Hepatology, Northwestern University-Feinberg School of Medicine, Chicago, Illinois.
5 Department of Gastroenterology, Hospital Universitario San Pedro de Alcántara, Cáceres, Spain; Centro de Investigación Biomédica en Red Enfermedades Hepáticas y Digestivas, Madrid, Spain.
6 Department of Gastroenterology, Hospital Universitario San Pedro de Alcántara, Cáceres, Spain; Centro de Investigación Biomédica en Red Enfermedades Hepáticas y Digestivas, Madrid, Spain; Department of Gastroenterology, Academic Medical Center, Amsterdam, The Netherlands.
7 Digestive Health Institute, Children's Hospital Colorado; Gastrointestinal Eosinophilic Diseases Program, University of Colorado School of Medicine, Aurora, Colorado.