Amplification of 200 specific target genes within the cDNA was performed according to the multiplexed target enrichment (MTE) protocol for single-cell gene expression analysis (Nanostring Technologies, Seattle, WA) using MTE primers designed by Nanostring. The enrichment conditions incorporated 10 μL of Taqman PreAmp 2× master mix (Thermo Fisher Scientific), 2 μL of pooled MTE primers, and 10 μL of cDNA. Following template denaturation at 94°C for 10 min, targeted enrichment was attained through 6 cycles of 94°C for 15 s, then 60°C for 4 min.