CRP and malaria: In the well, non-malaria anaemic group iron deficiency could be defined retrospectively on the basis of cut-offs in at least 2 of 3 iron sufficiency markers i.e. STfR >8.5 mg/l [9], ferritin <12 μg/l unless CRP >10 mg/l then <30, and ZnPP >61 μmol/mol haemoglobin [10].