GCH1 and malaria: GCH1 mRNA transcription was at least as high in each malaria group [UM (1.35 [IQR 1.11–1.97] 2-ddCt) and CM (1.39 [IQR 0.88–1.77] 2-ddCt)] relative to controls (0.82 [IQR 0.60–0.84] 2-ddCt) (p = 0.082).