<qa>  What is the gold standard of duodenal biopsy?Although the presentation of patients with coeliac disease may be protean, serological markers have provided a cheap and non-invasive method by which clinicians in both primary and secondary care can initially recognise patients who may have coeliac disease. The aim of this study is to assess the clinical utility of the whole blood transglutaminase-based rapid test against current serological tests and the gold standard of duodenal biopsy. 