“…CD is diagnosed in 28-45% of adults with SNVA [5,13,40]; among the remainder, the most common causes of non-CD SNVA are believed to be inter alia medication-related enteropathy and infectious causes, including giardiasis and small intestinal bacterial overgrowth, peptic duodenitis, and collagenous sprue [5,13,40,41]. In the paediatric population, the most common causes of SNVA are believed to be inflammatory bowel disease and infections, such as Giardia lamblia and Helicobacter pylori [12,17]. In up to 1/3 of patients, the cause of SNVA cannot be determined [5,12,13,17,40,41].…”