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:Classification of Genetic Variants All genetic variants in our cohort and those reported in the manuscripts uncovered by the literature search were reassessed and classified according to the current guidelines of the American College of Medical Genetics.13 For this evaluation, we used MAF data derived from the Exome Aggregation Consortium and the Exome Variant Server.
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