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:Such results may point out that ROS might be the major mechanism of the nanoHA‚Äì ZnO granules‚Äô antibacterial effect, which is in good agreement with other reports [10, 28].
Category: