, 2001) have been conducted since the establishment 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 type of antiretroviral therapy.