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:Preservation of hexokinase-II, inhibition of p53 and suppression of adenine nucleotide transport into the mitochondria are among the possible mechanisms of cardiomyocyte protection by GSK-3β phosphorylation as we discussed elsewhere [12].
Category: