Cell growth after in Ag-IVS. The results are reported as total viable lymphocytes. Cell viability was determined by erythrosin B exclusion. (□) Patient no. 4 (CD4 <400); (○) patient no. 5 (CD4 <400); (▴) patient no. 6 (CD4 <400); (♦) patient no. 7 (CD4 <400).