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:…side-effects are found with currently available hypnotics, it will be of interest to determine whether newer genetic methods for enhancing sleep in rodents can reverse/attenuate or slow-down Alzheimer's pathology in rodent models (Jego et al., 2013; Konadhode et al., 2013; Anaclet et al., 2014).
Category: