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:Recent metaanalyses focusing on empathic activations, elicitedwhenwitnessing others either undergoing pain or suffering emotionally, localized a core network including anterior insula (AI), inferior frontal gyrus (IFG), and anterior midcingulate cortex (aMCC) (Singer et al. 2004; Jackson et al. 2006; Singer 2006; Decety and Moriguchi 2007; Fan et al. 2011; Lamm et al. 2011).
Category: