Maternal vitamin B12 deficiency detected in expanded newborn screening
Keywords: THF، tetrahydrofolate; DBS, dried blood spot; Holo-TC, holo-transcobalamin; Hcy, homocysteine; MMA, methylmalonic acid; NBS, newborn screening; C3, propionyl carnitine; cbl, cobalamin; THF, tetrahydrofolate; MTHF, methyltetrahydrofolateVitamin B12 deficiency; Newborn screening;