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:5ubi:loxP-GFP-loxP-mCherry) (Mosimann et al., 2011; Kaufman et al., 2016), tfap2a;foxd3 (Wang et al.
Category: