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:…1–13, December 1, 2015 ª2015 Elsevier Inc. 1
2 Cell Metabolism 22, 1–13, December 1, 2015 ª2015 Elsevier Inc.
(Urakawa et al., 2006), the pro-hypertrophic effects of FGF23 on cardiac myocytes were blocked by pharmacologic inhibition of phospholipase Cg (PLCg) and calcineurin (Faul et al., 2011).
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