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:A link between PTSD symptoms and FM has also been reported in both careseeking (Sherman et al., 2000; Cohen et al., 2002; Roy-Byrne et al., 2004) and community (Raphael et al.
Category: