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:Like in other studies (Grober et al., 2010; Sarazin et al., 2010), the total recall item (the sum of the spontaneous and the cued recalls) revealed to be the most important measure in the distinction between patients and controls.
Category: