1. Department of Medicine; Celiac Disease Center; Columbia University College of Physicians and Surgeons; New York NY USA
2. Department of Medical Sciences; Uppsala Clinical Research Center; Uppsala University; Uppsala Sweden
3. Department of Surgical Sciences; Uppsala University; Uppsala Sweden
4. Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
5. Department of Paediatrics; Örebro University Hospital; Örebro Sweden
6. Division of Epidemiology and Public Health; School of Medicine; University of Nottingham; Nottingham UK