[1] Emory Univ, Dept Obstet & Gynecol, Div Reprod Infect Dis, Div Maternal Fetal Med, 550 Peachtree St NE, Atlanta, GA 30308 USA
[2] Emory Univ, Dept Internal Med, Div Infect Dis & Crit Care, Atlanta, GA 30308 USA
[3] Med Univ South Carolina, Dept Pediat, Div Neonatol, Charleston, SC 29425 USA
[4] Med Univ South Carolina, Dept Obstet & Gynecol, Charleston, SC 29425 USA
[5] Med Univ South Carolina, Dept Pediat, Div Infect Dis, Charleston, SC 29425 USA