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:We recently cloned, mapped and functionally characterized P450 1A5 (Yip and Coulombe, 2006) and 3A37 (Rawal et al., 2010b; Rawal et al., 2009) from turkey liver, which, like their human orthologs,
produced exo-AFBO, and the detoxified metabolites aflatoxin M1 (AFM1) and aflatoxin Q1 (AFQ1),…
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