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:Furthermore, microsatellite instable (MSI) colorectal cancers generally have a better prognosis and relatively rarely metastasize, yet around 5% of metastatic colorectal cancers are MSI (12).
Category: