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[B] The following conclusions are supported by fair evidence:
Serological testing; IgA antihuman tissue transglutaminase (TTG), IgA endomysial antibody immunofluorescence (EMA) and IgG Deamidated Gliadin Peptide (DGP); is the first step in diagnosing a person (adult or child over five years of age) with clinical symptoms of celiac disease.
Biopsies of the proximal small bowel (duodenal) are the gold standard for diagnosing celiac disease.
If the test results are indeterminate, testing for