Fox Michael H, Bonardi Alexandra, Krahn Gloria L
National Center for Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
Center for Developmental Disabilities Evaluation and Research (CDDER) E.K. Shriver Center, University of Massachusetts Medical School, Boston, Massachusetts, USA.
Int Rev Res Dev Disabil. 2015;48(4):73-114.