We identified 14 homozygous carriers of the abovementioned deletion in SLC11A2 in the Icelandic cohort, seven of whom had been diagnosed with IDA (microcytic anemia with low ferritin and/or low TSAT) and one with transfusion-dependent anemia; two had required transfusions and one intravenous iron (Supplementary Data 17). This evidence concerns the gene SLC11A2 and microcytic anemia.