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:NG86, Nei and Gojobori (1986); Com95, Comeron (1995); Li93, Li (1993) and Pamilo and Bianchi (1993); LWL85, Li et al. (1985); Ina95, Ina (1995); Unc, no multiple substitution correction was used; JC69, Jukes and Cantor (1969); K80, Kimura (1980); TN84, Tajima and Nei (1984); T92, Tamura (1992);‚Ä¶
Category: