Laboratory testing for non-sickling hemoglobinopathies in newborns.
 *In California, Hb Bart’s is quantified by HPLC; a level > 25% requires confirmatory testing for Hb H disease.
 †CA indicates citrate agar electrophoresis; AG, agarose gel electrophoresis; Var, variant hemoglobins (eg, Hb S, C, E, D, O-Arab).