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:This would be in accordance with data showing that the PVN is important for dietary preference for carbohydrates and lesions to the PVN result in increased preference for high fat diets (Aravich and Sclafani, 1983; Leibowitz, 1988; Hoebel et al., 1989).
Category: