1. GLUTEN3S Research Group, Department of Nutrition and Food Science, University of the Basque Country, 01006 Vitoria-Gasteiz, Spain
2. Bioaraba, Nutrición y Seguridad Alimentaria, 01006 Vitoria-Gasteiz, Spain
3. Children’s National Hospital, 111 Michigan Avenue NW, Washington, DC 20010, USA
4. Section of Gastroenterology, Hepatology and Nutrition, Pediatric Services, University Hospital of Araba, 01009 Vitoria-Gasteiz, Spain
5. Pediatric Services, Hospital of Mendaro-OSI Debabarrena, 20850 Mendaro, Spain
6. Coeliac Disease and Gluten Sensitivity Association of Madrid, 28028 Madrid, Spain