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:Methylation-Specific AFLP We employed a methylation-specific AFLP analysis that has been commonly used to survey patterns of methylation in a range of non-model species (Salmon et al., 2008; Herrera and Bazaga, 2010; Lira-Medeiros et al., 2010).
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