Figure 1From: VACUTAINER® CPT™ and Ficoll density gradient separation perform equivalently in maintaining the quality and function of PBMC from HIV seropositive blood samplesStudy design. Viability, recovery, and intracellular cytokine staining of activated PBMC were compared for fresh and cryopreserved HIV+ PBMC processed by different methods according to the flow chart depicted here.Back to article page