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 estimates of genetic correlations are within the ranges reported in the literature (Veseth et al., 1993; Wilson et al., 1993; Koots et al., 1994b; Marshall, 1994; Gregory et al., 1995), except for the correlation between fat thickness and hot carcass weight.
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