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:Based on our current results and a previous study involving development of motor innervation in the small intestine (Ward et al. 2006), ICC-DMP may mediate a significant portion of cholinergic responses in the circular muscle layer.
Category: