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:, 2000), which interacts with other proteins involved in neuronal migration, cell-signalling and -proliferation (Ishizuka et al., 2006), cytosceletal and synaptic function, neurite extension (Murdoch et al.
Category: