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:CRS-induced behavioral anomalies are accompanied by oxidative stress and neuroinflammation in different brain regions such as hippocampus (HC) and prefrontal cortex (PFC) (McEwen and Magarinos 1997; Chiba et al. 2012).
Category: