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© 2005 Wiley-Liss, Inc. Birth Defects Research (Part A) 73:663–668 (2005)
Birth Defects Research (Part A): Clinical and Molecular Teratology 73:663–668 (2005)
664 WANG ET AL.
Birth Defects Research (Part A) 73:663–668 (2005)
665IMPROVING CASE ASCERTAINMENT OF A POPULATION-BASED BIRTH DEFECTS REGISTRY
Birth Defects Research (Part A) 73:663–668 (2005)
666 WANG ET AL.
Birth Defects Research (Part A) 73:663–668 (2005)
667IMPROVING CASE ASCERTAINMENT OF A POPULATION-BASED BIRTH DEFECTS REGISTRY
Birth Defects Research (Part A) 73:663–668 (2005)
668 WANG ET AL.
Birth Defects Research (Part A) 73:663–668 (2005)