RT Journal Article SR Electronic T1 Using viral load, CD4+ levels, and clinical response to guide antiviral therapy for HIV JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 321 OP 328 VO 67 IS 5 A2 Vidt, Donald G. A1 Calabrese, Leonard H. YR 2000 UL http://www.ccjm.org/content/67/5/321.abstract AB The decision to start or modify antiviral therapy in patients with human immunodeficiency virus (HIV) infection is not based on any single factor. Although HIV RNA levels are the primary guide to therapy, the CD4+ count and clinical response are also important.