1. Laboratory of Women's Health, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina; Department of Carcinogenesis, University of Texas M.D. Anderson Cancer Center, Smithville, Texas; University of Texas Medical Branch at Galveston, Galveston, Texas
2. Laboratory of Women's Health, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina; Department of Carcinogenesis, University of Texas M.D. Anderson Cancer Center, Smithville, Texas; University of Texas Medical Branch at Galveston, Galveston, Texas; PO Box 12233, Mail Drop A2-01, Research Triangle Park, NC 27709