1. Inorganic Toxicology and Nutrition Branch, Division of Laboratory Sciences, National Center for Environmental Health, CDC, 4770 Buford Hwy., NE, Mail Stop F18, Atlanta, GA 30341
2. Section of Endocrinology, Diabetes, and Nutrition, Department of Medicine, Boston Medical Center, Evans Bldg., Room 201, 88 Newton St., Boston, MA 02118-2393
3. Department of Pediatrics, University of Kansas Medical Center, 435 N. 1500 Road, Lawrence, KS 66049