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:As shown in previous studies in BMDMs or RAW macrophages (10, 11, 17), wild-type TLR9 trafficked through the Golgi compartment, whereas full-length, Endo H–resistant TLR9-GFP was barely detectable (Fig.
Category: