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:The coordinated formation of each of these components is crucial to synaptic function, and genetic studies have revealed
multiple conserved pathways that control their development (Collins and DiAntonio, 2007; Harris and Littleton, 2015; Menon et al., 2013).
Category: