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:…in superioinferior breast displacement has also been positively correlated with increases in exercise-induced breast pain (Bridgman et al., 2010; Scurr et al., 2010), and consequently breast biomechanics research has made recommendations to wear a high level of breast support (sports bra) when…
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