作者单位:
New York Med Coll, Dept Obstet & Gynecol, Valhalla, NY 10595 USA
[1]
Univ Michigan Hlth Syst, Dept Anesthesiol, Ann Arbor, MI USA
[2]
Brigham & Womens Hosp, Dept Med, Div Pharmacoepidemiol & Pharmacoecon, Boston, MA 02115 USA
[3]
Ctr Dis Control & Prevent, Natl Ctr Chron Dis Prevent & Hlth Promot, Div Heart Dis & Stroke Prevent
[4]
Ctr Dis Control & Prevent, Natl Ctr Chron Dis Prevent & Hlth Promot, Div Reprod Hlth, Atlanta, GA
[5]
发布时间
2015-03-19