In contrast, non-pregnant RA patients with active disease (DAS28-CRP >3.2) showed a lower frequency of Vδ2 T cells (median 0.80, range 0.16–3.48) compared to non-pregnant RA patients with the inactive disease (median 2.04, range 0.24–9.54; P = 0.04; data not shown). Here, CRP is linked to glycogen storage disease VI.