[1] US Dept HHS, Div Human Dev & Disabil, Natl Ctr Birth Defects & Dev Disabil, Ctr Dis Control & Prevent, Atlanta, GA USA
[2] 8613 Undermire Court, Bowie, MD USA
[3] US Dept HHS, Natl Inst Disabil Independent Living & Rehabil Re, Adm Community Living, Washington, DC 20201 USA
[4] Eunice Kennedy Shiver Natl Inst Child Hlth & Huma, Natl Ctr Med Rehabil Res, NIH, US Dept HHS, Bethesda, MD USA
[5] US Dept HHS, Off Dis Prevent & Hlth Promot, Off Assistant Secretary Hlth, Rockville, MD USA