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:This result is consistent with other research suggesting that USVs are not related to cocaine- or amphetamine-induced locomotor activity (Taracha et al. 2012, 2014; Ahrens et al. 2013).
Category: