1. Kennedy Center for Research on Human Development and Department of Hearing and Speech Sciences, Vanderbilt University, Nashville, Tennessee, USA
2. Department of Psychological and Brain Sciences, University of Louisville, Louisville, Kentucky, USA
3. Birth Defects Center, Department of Molecular, Cellular and Craniofacial Biology, University of Louisville, Louisville, Kentucky, USA
4. College of Education and Human Development, University of Louisville, Louisville, Kentucky, USA