共 15 条
- [11] SADOVNICK AD, 1982, CAN J PUBLIC HEALTH, V73, P248
- [13] A COST-BENEFIT-ANALYSIS OF PRENATAL DETECTION OF DOWN SYNDROME AND NEURAL-TUBE DEFECTS IN OLDER MOTHERS [J]. AMERICAN JOURNAL OF MEDICAL GENETICS, 1981, 10 (04): : 367 - 378
- [14] MATERNAL AGE AND DOWN SYNDROME - AGE-SPECIFIC INCIDENCE RATES BY SINGLE-YEAR INTERVALS [J]. AMERICAN JOURNAL OF MEDICAL GENETICS, 1978, 2 (01): : 1 - 5
- [15] 1977, MRC5 MED RES COUNC R