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:Data concerning the effects of AZD1152-HQPA on apoptosis are scant, although our analysis seems to be in disagreement with the results of Oke et al (2009), who reported that the Aurora B kinase inhibitor induced a strong increase in an Annexin V-positive cell fraction in studies in primary AML‚Ä¶
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