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:FGFR4 Blockade Attenuates LVH in the 5/6 Nephrectomy Rat Model of CKD We tested the therapeutic potential of interfering with cardiac FGF23-FGFR4 signaling in the 5/6 nephrectomy rat model of CKD that develops increased FGF23 levels, severe hypertension, and LVH within 14 days after nephrectomy (Faul et al., 2011).
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