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:However, the pretreatment ADC values had conflicting results to predict response in the studies of unsubtyped breast cancer.(7,10) Our study found that the preNAC ADC value of pCRs was significantly lower than that of pNCRs only in the triple-negative subtype among four subtypes.
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