共 20 条
- [11] EXACT SAMPLE SIZES FOR USE WITH FISHER-IRWIN TEST FOR 2X2 TABLES [J]. BIOMETRICS, 1978, 34 (01) : 106 - 109
- [12] CHROMOSOMAL ABNORMALITY RATES AT AMNIOCENTESIS AND IN LIVE-BORN INFANTS [J]. JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION, 1983, 249 (15): : 2034 - 2038
- [13] JEANTY P, 1985, J ULTRAS MED, V4, P525
- [14] JEANTY P, 1982, J ULTRASOUND MED S, V189
- [15] INTRODUCTION TO SAMPLE-SIZE DETERMINATION AND POWER ANALYSIS FOR CLINICAL-TRIALS [J]. CONTROLLED CLINICAL TRIALS, 1981, 2 (02): : 93 - 113
- [16] MITCHELL A, 1876, J MENT SCI, V22, P161
- [17] NELSON LH, 1982, OBSTET GYNECOL, V59, P657
- [19] FETAL CEPHALOMETRY BY ULTRASOUND AS A SCREENING-PROCEDURE FOR THE PRENATAL DETECTION OF DOWNS-SYNDROME [J]. BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY, 1984, 91 (02): : 138 - 143