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:Mammalian UCEs have been linked to a diverse set of regulatory functions including transcriptional enhancers (Woolfe et al. 2005; Pennacchio et al. 2006; Lampe et al. 2008; Visel et al. 2008; Viturawong et al. 2013) and noncoding RNAs (ncRNAs) (Feng et al. 2006; Calin et al. 2007; Mestdagh et al.…
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