作者单位:
Oregon Hlth & Sci Univ, Dept Pediat, Portland, OR 97201 USA
[1]
Oregon Hlth & Sci Univ, Dept Obstet & Gynecol, Portland, OR 97201 USA
[2]
San Francisco State Univ, Dept Econ, San Francisco, CA 94132 USA
[3]
Univ Southern Calif, Fetal & Neonatal Inst, Div Neonatol, Childrens Hosp Los Angeles,Dept Pediat
[4]
发布时间
2022-10-11