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:Language difficulties are often considered as secondary effects of a broader condition, but our results suggest that haploinsufficiency of genes in the BP3-BP5 region can influence language ability directly, reinforcing the view that recurrent CNVs relevant for neurodevelopmental phenotypes tend to be incompletely penetrant and associated with a variable phenotype [45].
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