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 results support the previous study in the M. fascicularis (Ruiz-Herrera et al., 2002a), where 51.14% of chromosome bands where ITSs are located express aphidicolin-induced fragile sites.
Category: