Editorial

• Leadership Is Required for Getting American Minorities into Research

  John F. Alderete
  P. A366

The Environmental Genome Project: Suggestions and Concerns
Response: Environmental Genome Project
Interregional Differences Undermine Sperm Trend Conclusions
Debate about Sperm Count Decline
Response: A Reanalysis of Sperm Density Data
P. A368

Forum

Pesticide Use in Developing Countries
The Relentless Flu Drug
EPA's PM_2.5 Program Criticized
Not Breathing Easier
EHPnet: Global Surveillance
P. A372

NIEHS Receives External Review
P. A376

Why the Grass Isn't Always Greener
P. A378

A Half Century of Health
P. A386

Reviews

• Recent Developments in the Investigation of Thyroid Regulation and Thyroid Carcinogenesis
  Gordon C. Hard
  P. 427

• Mode of Carcinogenic Action of Pesticides Inducing Thyroid Follicular Cell Tumors in Rodents
  Pamela M. Hurley, Richard N. Hill, and Rick J. Whiting
  P. 437

  Risk Assessment of Thyroid Follicular Cell Tumors
  Richard N. Hill, Thomas M. Crisp, Pamela M. Hurley, Sheila L. Rosenthal, and Dharm V. Singh
  P. 447

• Volatile N-Nitrosamine Formation after Intake of Nitrate at the ADI Level in Combination with an Amine-rich Diet
  Ingrid T.M. Vermeer, Danielle M.F.A. Pachen, Jan W. Dallinga, Jos C.S. Kleinjans, and Jan M.S. van Maanen
  P. 459

• Transformation of Human Osteoblast Cells to the Tumorigenic Phenotype by Depleted Uranium-Uranyl Chloride
  Alexandra C. Miller, William F. Blakely, David Livengood, Tim Whittaker, Jiaquan Xu, John W. Ejnik, Matthew M. Hamilton, Eric Parlette, Theodore St. John, Henry M. Gerstenberg, and Hannah Hsu
  P. 465

• The Influence of Bone and Blood Lead on Plasma Lead Levels in Environmentally Exposed Adults
  Mauricio Hernández-Avila, Donald Smith, Fernando Meneses, Luz Helena Sanin, and Howard Hu
  P. 473

• Interactive Effects of Environmentally Relevant Polychlorinated Biphenyls and Dioxins on [³H]Phorbol Ester Binding in Rat Cerebellar Granule Cells
  Prasada Rao S. Kodavanti and Thomas R. Ward
  P. 479

• Effects of Oral Exposure to Mining Waste on in Vivo Dopamine Release from Rat Striatum
  Verónica M. Rodríguez, Leticia Dufour, Leticia Carrizales, Fernando Díaz-Barriga, and María E. Jiménez-Capdeville
  P. 487

• ¹⁵N Investigation into the Effect of a Pollutant on the Nitrogen Metabolism of Tetrahymena pyriformis as a Model for Environmental Medical Research
  Kerstin Arndt, Diana Hofmann, Matthias Gehre, and Peter Krumbiegel
  P. 493

• Assessment of Lead Exposure in Schoolchildren from Jakarta
  Inga Heinze, Rainer Gross, Peter Stehle, and Drupadi Dillon
  P. 499

  Urinary Nickel Excretion in Populations Living in the Proximity of Two Russian Nickel Refineries: A Norwegian-Russian Population-based Study
  Tone Smith-Sivertsen, Valeri Tchachtchine, Eiliv Lund, Vladimir Bykov, Yngvar Thomassen, and Tor Norseth
  P. 503

High Breast Milk Levels of Polychlorinated Biphenyls (PCBs) among Four Women Living Adjacent to a PCB-Contaminated Waste Site
Susan A. Korrick and Larisa Altshul
P. 513

• Extramurally Speaking: Research Areas of Special Emphasis