Control selection and participation in an ongoing, population-based, case-control study of birth defects: the National Birth Defects Prevention Study.
Cogswell ME, Bitsko RH, Anderka M, Caton AR, Feldkamp ML, Hockett Sherlock SM, Meyer RE, Ramadhani T, Robbins JM, Shaw GM, Mathews TJ, Royle M, Reefhuis J; National Birth Defects Prevention Study.
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