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:A more recent study has employed a novel technique to measure body fluid compartments using bioimpedance spectroscopy, and showed increases in measured total body water (TBW) and ECFV with a trend for intracellular fluid increase in RGZ-treated mice (Fu et al., 2015).
Category: