Authors: OLSEN CL POLAN AK CROSS PK

Citation: Cl. Olsen et al., CASE ASCERTAINMENT FOR STATE-BASED BIRTH-DEFECTS REGISTRIES - CHARACTERISTICS OF UNREPORTED INFANTS ASCERTAINED THROUGH BIRTH CERTIFICATES AND THEIR IMPACT ON REGISTRY STATISTICS IN NEW-YORK-STATE, Paediatric and perinatal epidemiology, 10(2), 1996, pp. 161-174