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- [25] Maternal age-standardisation of prevalence of Down's syndrome LANCET, 1999, 354 (9178): : 529 - 530
- [26] The impact of maternal age on the cost effectiveness of Down's syndrome screening BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY, 1996, 103 (06): : 581 - 583
- [27] The impact of maternal age on the cost effectiveness of Down's syndrome screening BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY, 1996, 103 (11): : 1175 - 1176
- [28] DOWN-SYNDROME PREVENTION PROGRAM IN A POPULATION WITH AN OLDER MATERNAL AGE OBSTETRICS AND GYNECOLOGY, 1995, 85 (03): : 368 - 373