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CHD, congenital heart disease; BSID-II, Bayley Scales of Infant Development-II; PQ, psychomotor developmental quotient; MQ, mental developmental quotient; K-WPPSI, Korean Wechsler Preschool and Primary Scale of Intelligence; FIQ, full-scale intelligence quotient; PIQ, performance intelligence quotient; VIQ, verbal intelligence quotient.
