*University of South Carolina, Columbia, SC, USA; and †Michigan State University, East Lansing, MI, USA.
Supported by ATSDR 1 RO1 TS000007-02 and 1 R01 TS000069-01.
Abstracts published in Epidemiology have been reviewed by the organizations of Epidemiology. Affliate Societies at whose meetings the abstracts have been accepted for presentation. These abstracts have not undergone review by the Editorial Board of Epidemiology.