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A. A pilot for phenylketonuria (PKU) screening was implemented in Texas in 1963. PKU testing was mandated by the 59th Legislature in 1965. Screenings for additional disorders were added with galactosemia in 1978, congenital hypothyroidism in 1980, sickle cell disease in 1983 and congenital adrenal hyperplasia (CAH) in 1989.
