[1] Tennessee Dept Hlth, Chattanooga, TN 37403 USA
[2] Vanderbilt Univ, Nashville, TN USA
[3] CDC, Div Dev Disabil & Birth Defects, Atlanta, GA 30333 USA
[4] CDC, Div Blood Disorders, Natl Ctr Birth Defects & Dev Disabil, Atlanta, GA 30333 USA
[5] CDC, EIS Officers, Atlanta, GA 30333 USA