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:This design captured 11,383,697 bp within the non-recombining malespecific Y-chromosome, consistent with regions genotyped by previous Y sequencing studies [41] and the Y positions placed on the phylogenetic tree by the Y Chromosome Consortium [28].
Category: