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:…at later times (103–376 days) following the
circuits (Mossop et al. 2000; Vale and Sanes 2002; Wang et al. 2009; Whiting et al. 2009; Xie and Manis 2013), and changes in the relative strength of auditory and non-auditory synaptic inputs (Shore et al. 2008; Barker et al. 2012; Zeng…
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