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:Intrinsic properties of NT MSNs (n = 59) were not significantly different from those measured from both hWT (n = 62) and hMT neurons both from coronal and parasagittal slices (n = 76, 27, respectively) (Table 1), and did not differ from those previously described for mouse MSN in tissue slice preparations (Goldberg et al., 2005; Bonsi et al., 2008).
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