[1] Weill Cornell Med Ctr, Dept Obstet & Gynecol, 525 East 68th St, New York, NY 10065 USA
[2] Columbia Univ, Coll Phys & Surg, New York Presbyterian Hosp, Dept Surg, New York, NY USA
[3] Columbia Univ, Coll Phys & Surg, Dept Med, Div Pulm Allergy & Crit Care Med, New York, NY USA
[4] New York Presbyterian Hosp Queens, Dept Maternal Fetal Med, New York, NY USA