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:These findings were supported by additional studies indicating that knockdown of EAAT3 resulted in both epilepsy and limbic hyperexcitability (Sepkuty et al., 2002; Mathews and Diamond, 2003).
Category: