**<p>blood transfusion prior to drawing blood: HA09 42 days, HA24 37 days.</p><p>m: male.</p><p>f: female.</p><p>UI: International Unit.</p><p>G6PD: Glucose -6- Phosphate Dehydrogenase.</p><p>TPI: Triose Phosphate Isomerase.</p><p>GPI: Glucose Phosphate Isomerase.</p><p>ND: No Data.</p><p>The complete panel of enzyme assays performed on all samples in this study including controls can be found in Supplementary <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0034237#pone-0034237-t001" target="_blank">Table 1</a>.</p
