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:Macrolides such as clarithromycin 250 mg twice daily for 2 months and then 250 mg/d for an additional 1 month can result in resolution of BOOP.(17) Members of the macrolide
Category: