Correlations between median granulocyte VCN and biochemical and immunological outcomes. The median granulocyte VCN for each subject (as in Figure 2) were plotted vs the median values calculated for each subject for (A) PBMC ADA enzyme activity, (B) RBC deoxyadenosine nucleotides, (C) ALC, (D) absolute numbers of CD3⁺ T cells, (E) absolute numbers of CD19⁺ B cells, and (F) serum IgM levels. R values shown represent Spearman correlations between median granulocyte VCN and median of each of the outcome parameters.