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:Significant correlations between a poor performance on the FCSRT and AD biomarkers have also been shown with regard to medial temporal lobe (Sánchez-Benavides et al., 2014; Sarazin et al., 2010) and cerebrospinal fluid biomarkers (Wagner et al., 2012).
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