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:A closely related analogue of CGP78850, CGP85793, prevented sperm capacitation and increase in P-Tyr (de Lamirande and Gagnon, 2002), again emphasizing the difference in the regulation between this process and AR.
Category: