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:…of ER-mitochondria intersections within cells, and that Spire1CΔKIND-mediated disruption of mitochondrial fission (see Figure 4C, right panel) could be due to a reduction in ER-mediated mitochondrial constriction in these cells (Friedman et al., 2011; Korobova et al., 2013; Murley et al., 2013).
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