title: Reply.
authors.affiliation: Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, College of Medicine, University of South Florida, Tampa, FL. Electronic address: mcain@health.usf.edu.
authors.forename: Mary Ashley
authors.initials: MA
authors.lastname: Cain
authors.affiliation: Department of Family and Community Medicine, Baylor College of Medicine, Houston, TX.
authors.forename: Jason L
authors.initials: JL
authors.lastname: Salemi