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:…note, our results indicate disrupted fiber integrity (FA decreases) and disrupted tissue microstructures (MD increases) in schizophrenia that concur with results of previous histopathologic studies where abnormalities in oligodendrocyte function have been reported [Uranova et al., 2001, 2004].
Category: