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:Finally, if there is a significant association between a candidate SNP and BPF, we performed causal pathway analyses using Cooper‚Äôs Local Causal Discovery algorithm [28] to determine whether the relationships between candidate SNP and BPF is mediated by T2LV.
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