机构:
Columbia Univ, Dept Obstet & Gynecol, Med Ctr, New York, NY USAEunice Kennedy Shriver Natl Inst Child Hlth & Hum, Div Intramural Populat Hlth Res, NIH, Rockville, MD USA
机构:
Columbia Univ, Dept Obstet & Gynecol, Med Ctr, New York, NY USAEunice Kennedy Shriver Natl Inst Child Hlth & Hum, Div Intramural Populat Hlth Res, NIH, Rockville, MD USA