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:Both the baseline assessment and the followup assessment included the measurement of the health related quality of life by the Physical Component Summary measure (PCS) and the Mental Component Summary measure (MCS) of the Short Form-36 (SF-36) score [24–26]; basic ADL functioning by the Care Dependency Scale (CDS) [27] and cognitive functioning by the Mini-Mental State Examination (MMSE) [28].
Category: