1Division of Digestive and Liver Diseases, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York, USA;

2Beyond Celiac, Ambler, Pennsylvania, USA;

3Department of Population Health Sciences, Duke University School of Medicine, Durham, North Carolina, USA;

4Children's Hospital Colorado, Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA.

Correspondence: Benjamin Lebwohl, MD, MS. E-mail: [email protected].