Ross Danielle S, Jones Jeffery L, Lynch Michael F
Centers for Disease Control & Prevention, National Center on Birth Defects and Developmental Disabilities, 1600 Clifton Road, NE, MailStop E-88, Atlanta, Georgia 30333, USA.
Matern Child Health J. 2006 Sep;10(5 Suppl):S187-91. doi: 10.1007/s10995-006-0092-0.