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:The mutant version of the tumor suppressor p53, which is mutated in 50% of cancers, drives invasion through enhanced Rab coupling protein (RCP)–dependent recycling of α5β1, the main receptor for FN, and several RTKs, EGFR, and Met (Caswell et al., 2008; Muller et al., 2013).
Category: