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:Furthermore, our results are consistent with studies that have shown an association of CRP with delirium in non-ICU cohorts [19-21], delirium following stroke [48] and sepsis [49], and delirium in one small study of 32 ICU patients, which did not adjust for confounders [50].
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