1. Departments of Molecular and Integrative Physiology (W.W., M.K.B.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
2. Department of Obstetrics and Gynecology (R.N.T.), Wake Forest School of Medicine, Winston-Salem, North Carolina 27157
3. Department of Obstetrics and Gynecology (R.N.T.), Emory University School of Medicine, Atlanta, Georgia 30303
4. Comparative Biosciences (I.C.B.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801