IL4 and systemic sclerosis: The mean % IL-4+ cells among CD3+, Vγ9+, and Vδ1+ T cells in PBMC of SSc (n = 7, patients 13–19 in Table 1) and HC (n = 5) in the presence of non-TCR-dependent stimulation (PMA and ionomycin) were virtually identical (respectively, 28.2 ± 22.2 vs 35.0 ± 8.22, p < 0.75, 34.0 ± 9.18 vs 32.1 ± 9.18, p < 0.49, 15.6 ± 4.7 vs 16.5 ± 8.7, p < 0.91).