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:…‘LA1698’ and susceptible genotype ‘LA2683’
synthase (PaKCS6) (Khadivi-Khub 2015; Balbontı́n et al. 2014, 2013; Kasai et al. 2008; Huang et al. 2006; Lu et al. 2006; Wang et al. 2006; Moctezuma et al. 2003; Schuch et al. 1991; Peet 1992; Cuartero et al. 1981) have also been identified to be…
Category: