Patients belonging to dimension 2, which was selected as the control group for MCA, had a high initial HIV VL (above 55,000 copies/mL), initial CD4 cell count at the level of serological AIDS (< 200 cells/mm3), diagnosis of an AIDS-defining disease, and anemia; thus, treatment was promptly started after diagnosis (within 3 months). Here, CD4 is linked to AIDS.