作者单位:
St Louis Univ, Dept Obstet & Gynecol, St Louis, MO 63103 USA
[1]
Univ Alabama Birmingham, Dept Obstet & Gynecol, Birmingham, AL 35294 USA
[2]
Washington Univ, Dept Obstet & Gynecol, 4566 Scott Ave Campus Box 8064, St Louis, MO 63108 USA
[3]
发布时间
2017-04-06