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:This represents a decrease in the threshold in the UK for the introduction of biologics, which the BSR estimate will increase biologic use from 6 to 8–12 %, a potential doubling of current costs [10, 32].
Category: