IGHE and hereditary elliptocytosis: Serum IgE concentrations were variable between individuals (median 13.1 μg/mL; range 0.7–230.6 μg/mL), but similar between the groups (medians: HE 11.9 μg/mL; MEA 12.4 μg/mL; SEA 12.3 μg/mL).