From the 1Department of Obstetrics and Gynecology, University of North Carolina School of Medicine, Chapel Hill, NC; 2Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC; and 3Biomonitoring and Health Assessment Branch, Division of Applied Research and Technology, National Institute for Occupational Safety and Health, Cincinnati, OH.
Received October 4, 2007; revised and accepted December 4, 2007.
Financial disclosure: None reported.
Funding/support: This study was funded as intramural research at the National Institutes of Health, National Institute of Environmental Health Sciences with support from the Office of Research on Minority Health and by Women's Reproductive Health Research Career Development Center Grant 5K12 HD050113-02 at the University of North Carolina.
Address correspondence to: Anne Z. Steiner, MD, MPH, Department of Obstetrics and Gynecology, University of North Carolina, CB #7570, Old Clinic Building, Chapel Hill, NC. E-mail: [email protected]
