1. Clinical Epidemiology Division, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
2. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
3. Department of Pediatrics, Örebro University Hospital, Örebro, Sweden
4. Division of Epidemiology and Public Health, University of Nottingham School of Medicine, Nottingham, United Kingdom
5. Celiac Disease Center, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York
6. Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark