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:Other extrathyroidal pathologies coexisting with THA are: familial dilated cardiomyopathy and hypergonadotrophic hypogonadism (Gursoy et al. 2006), autoimmune polyglandular syndrome type III (Papi et al.
Category: