Key references: Overview of iron deficiency

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Nixon CP, Sweeney JD. Severe iron deficiency anemia: red blood cell transfusion or intravenous iron? Transfusion 2018;58(8):1824-6. https://www.ncbi.nlm.nih.gov/pubmed/30198610
Richards T, Breymann C, Brookes MJ, Lindgren S, Macdougall IC, McMahon LP, et al. Questions and answers on iron deficiency treatment selection and the use of intravenous iron in routine clinical practice. Ann Med 2021;53(1):274-85. https://www.ncbi.nlm.nih.gov/pubmed/33426933
Soppi ET. Iron deficiency without anemia - a clinical challenge. Clin Case Rep 2018;6(6):1082-6. https://www.ncbi.nlm.nih.gov/pubmed/29881569