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:…of highly active antiretroviral therapy (HAART) as the standard of care, with six additional studies (Baigis et al., 2002; Lox et al., 1996; MacArthur et al., 1993; Perna et al., 1999; Stringer, Berezovskaya, O’Brien, Beck, & Casaburi, 1998; Terry et al., 2006) including subjects on some…
Category: