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:Five publications [32, 41, 43, 45, 46] out of the 25 that we reviewed focused on capacity building among people who use drugs and suggested that individuals who use drugs who participate in research-related activities (especially those who are affiliated with communitybased agencies) should be offered employment, salaries, recognition, training, opportunities to participate in
Category: