1 Department of Obstetrics and Gynecology, The Ohio State University, Columbus, OH.
2 Department of Obstetrics and Gynecology, Indiana University, Indianapolis, IN.
3 Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL.
4 RTI International, Durham, NC.
5 Department of Environmental and Occupational Health, University of California, Irvine, Irvine, CA.
6 Department of Obstetrics and Gynecology, Case Western Reserve University, Cleveland, OH.
7 Department of Obstetrics and Gynecology, University of Pittsburgh, Pittsburgh, PA.
8 Department of Obstetrics and Gynecology, Columbia University, New York, NY.
9 Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT.
10 Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, PA.
11 Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, TX.
12 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, The Ohio State University, 395 West 12th Avenue, Floor 5, Columbus, OH 43210.
13 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, The Ohio State University, 395 West 12th Avenue, Floor 5, Columbus, OH 43210. Electronic address: Kartik.venkatesh@osumc.edu.