Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:We recently demonstrated that the small-bowel mucosal vasculature is altered in untreated celiac disease [10] and also that celiac patient-derived anti-TG2 antibodies disturb several steps in angiogenesis [13] and increase vascular permeability [14] in vitro.
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