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:In light of recent suggestions that a more conservative voxel-wise threshold should be used for whole brain fMRI analyses [Woo et al., 2014], we also applied a more conservative voxel-wise threshold of P< 0.
Category: