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:DOI: 10.7554/eLife.08828 14 of 27
mitochondria (Friedman et al., 2011; Murley et al., 2013), with the ER providing a platform for actin polymerization mediated by the ER-anchored formin INF2 (Korobova et al., 2013, 2014; Hatch et al., 2014).
Category: