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:On the other hand, phospho-GSK-3β has recently received attention as a common mediator in protective mechanisms activated by different interventions, including IPC and ischemic postconditioning (IPost-C) [3,4,11,12].
Category: