[1] UTHlth Sch Publ Hlth, Dept Epidemiol Human Genet & Environm Sci, Houston, TX USA
[2] Baylor Coll Med, Dept Family & Community Med, Houston, TX USA
[3] Univ S Florida, Dept Community & Family Hlth, Coll Publ Hlth, Birth Defects Surveillance Program, Tampa, FL USA