Age and Poverty as Risk Factors
Lorenzo Tomatis
P. 620

Environews

Forum
P. 622

• NIEHS News
  P. 628

  Focus

  Extra Ingredients: Hormones in Food
  P. 632
  Debatable Edibles: Bioengineered Foods
  P. 636
  Spheres of Influence
  The Environmental Lobbying Game: Who Plays It on Capitol Hill and How
  P. 640
  Innovations
  The Mammary Gland: Protein Factory of the Future
  P. 644

Reviews & Commentaries

• Frog Skin Opioid Peptides: A Case for Environmental Mimicry
  Lawrence H. Lazarus, Sharon D. Bryant, Martti Attila, and Severo Salvadori
  P. 648

• Inconsistencies and Open Questions Regarding Low-Dose Health Effects of Ionizing Radiation
  Rudi H. Nussbaum and Wolfgang Köhnlein
  P. 656

• Scientists in the Courtroom: Basic Pointers for the Expert Scientific Witness
  David L. Eaton and David Kalman
  P. 668

• Enhancing the Role of the Scientific Expert Witness
  Gilbert S. Omenn
  P. 674

  Endocrine Effects of Prenatal Exposure to PCBs, Dioxins, and Other Xenobiotics: Implications for Policy and Future Research
  Linda S. Birnbaum
  P. 676

• Developmental Abnormalities of the Gonad and Abnormal Sex Hormone Concentrations in Juvenile Alligators from Contaminated and Control Lakes in Florida
  Louis J. Guillette Jr., Timothy S. Gross, Greg R. Masson, John M. Matter, H. Franklin Percival, and Allan R. Woodward
  P. 680

  The Reproducibility of ¹⁰⁹ Cd-based X-ray Fluorescence Measurements of Bone Lead
  Chris L. Gordon, Colin E. Webber, and David R. Chettle
  P. 690

Meeting Reports

Human Health and the Environment in Eastern and Central Europe
Cheryl D. Rose and Arthur D. Bloom
P. 696