
Keywords: طیف سنجی جرمی پشت سر هم یا متوالی; ACHDNC; Advisory Committee on Heritable Disorders in Newborns and Children; MS/MS; tandem mass spectrometry; NBS; newborn bloodspot screening; NCHS; National Center for Health Statistics; R4S; Region 4 Stork; SACHDNC; Secretary of Health and Human Service