TY  - GEN
AU  - Zhang,J
AU  - Fried,D B
TI  - Relationship of maternal smoking during pregnancy to placenta previa
SN  - 0749-3797
PY  - 1992///1216
KW  - Bias
KW  - Female
KW  - Humans
KW  - Maternal-Fetal Exchange
KW  - North Carolina
KW  - Odds Ratio
KW  - Placenta Previa
KW  - etiology
KW  - Pregnancy
KW  - Prevalence
KW  - Risk Factors
KW  - Smoking
KW  - adverse effects
N1  - Publication Type: Journal Article; Review
ER  -