We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCohorts, trials, and evidence: expanding our confidence in guidelines for antiretroviral resistance testing.AuthorsVolberding, PaulPublicationAnnals of internal medicine, 2009, Vol 151, Issue 2, p135ISSN1539-3704Publication typeCommentaryDOI10.7326/0003-4819-151-2-200907210-00011