1. Celiac Disease Center; Columbia University College of Physicians and Surgeons; New York USA
2. Division of Gastroenterology and Hepatology; The Mayo Clinic; Rochester MN USA
3. Department of Laboratory Medicine and Pathology; The Mayo Clinic; Rochester MN USA
4. Celiac Center; Beth Israel Deaconess Medical Center and Celiac Research Program; Harvard Medical School; Boston MA USA
5. Tampere Center for Child Health Research; School of Medicine; University of Tampere and Tampere University Hospital; Finland Europe
6. Division of Allergy/Immunology; Department of Medicine; University of California; San Francisco CA USA