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:…screening of chemical libraries was performed to identify correctors (pharmacological chaperones) that could promote folding of Phe508 CFTR (Pedemonte et al., 2005; Van Goor et al., This work was supported by a grant from the Canadian Institutes of Health Research and a grant from the…
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