1. Laboratories for Reproductive Biology and the Departments of Pediatrics (J.A.K., E.L., C-i.W., E.M.W.), University of North Carolina Chapel Hill North Carolina 27599
2. Biochemistry and Biophysics (E.L., E.M.W.) University of North Carolina Chapel Hill North Carolina 27599
3. Endocrinology Branch (K.B., W.R.K.) Reproductive Toxicology Division National Health and Environmental Effects Research Laboratory United States Environmental Protection Agency Research Triangle Park, North Carolina 27711