作者单位:
Vanderbilt Univ, Dept Obstet & Gynecol, Nashville, TN 37235 USA
[1]
Univ Michigan, Dept Obstet & Gynecol, Ann Arbor, MI 48109 USA
[2]
So Calif Permanente Med Grp, Dept Obstet & Gynecol, Irvine, CA USA
[3]
Univ Michigan, Sch Publ Hlth, Ann Arbor, MI 48109 USA
[4]
Massachusetts Gen Hosp, Dept Obstet & Gynecol, Boston, MA 02114 USA
[5]
发布时间
2017-04-05