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:Using this KO model, DRA was found to contribute significantly to transcellular oxalate absorption, accounting for 42, 57 and 41% of J ms across the distal ileum, cecum and distal colon, respectively [17].
Category: