Department of Gastroenterology and Hepatology;
VU University Medical Centre;
DSM Biotechnology Centre;
Department of Immunohematology and Blood Transfusion;
Leiden University Medical Centre;
Department of Pathology;
VU University Medical Centre;
Department of Paediatrics;
University Hospital Maastricht;
Department of Paediatrics;
University of Debrecen;
Paediatric Research Centre;
University of Tampere;
Celiac; disease; Gluten; Enzyme; Prolyl; endoprotease; Aspergillus; niger; prolyl; endoprotease; Treatment; Adverse; events; efficacy; IgA-tTG; intestinal; deposits;