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:Although not asked to patients themselves, our results indicated that physicians estimation was that patients’ perspective on NGS panels is likely to be highly positive (~66,5 %), coinciding with studies on pharmacogenomics/-genetics that did include patients in their study population [15, 16].
Category: