Abstract
To the Editor: Because it seems unfortunate that mis-understandings in some places have delayed the inauguration of screening programs for phenylketonuria in newborn infants I am sending this or a similar letter to the editors of several medical journals. It occurred to me that a preliminary published note regarding the ten-month experience of Massachusetts in the nationwide screening project might be of value to physicians and health officers of other states, especially in states not presently participating or participating only on a limited basis.In the nationwide program sponsored by the Children's Bureau using the Guthrie bacterial-inhibition assay on heel . . .

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