MedicineHematologyImmunologyClinical ImmunologyHematopathologyTransfusion MedicineAnemiaClinical HematologyComplement SystemHematologic DisordersHemolytic DisordersImmunoglobulin FunctionAnemia ClassificationAnemia DiagnosticsAntigen-antibody InteractionsComplement Activation PathwaysComplement DeficienciesComplement In Hematologic DisordersHemolysis MechanismsState-of-the-art Review