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:These results are in accordance with previous reports demonstrating that olanzapine treatment did not modify the meal size (Chintoh et al. 2008; Weston-Green et al. 2011; WestonGreen et al. 2012), but may reduce the inter-meal period thereby causes hyperphagia (Lee and Clifton 2002).
Category: