Perspectives

Editorial

• Ultrafine Particles in the Urban Air: To the Respiratory Tract--And Beyond?
  Günter Oberdörster and Mark J. Utell
  p. A 440

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Correspondence

• Bioavailability of D₄ after Inhalation and Implantation Exposure to Silicones
• Further Comments on the Bioavailability of D₄
• Rebuttal and Critical Review of Andersen et al.'s D₄ PBPK Model
  p. A 442

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Environews

Forum

• U.S. Air Only Fair
• Bad Grades for School Buses
• What's That Smell?
• Lung Disease a Drain on Coffers
• EHPnet: DieselNet
• The Beat
  p. A 452

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NIEHS News

• Particulate Matter--A Particular Concern
• Rising from the Ashes: NIEHS Awards Post-WTC Grants
  p. A 456

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Focus

• Fuel for the Long Haul? Diesel in America
• The Road to a Better Environment?
  p. A 458

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Spheres of Influence

• Debate Percolates over CAFE Standards
  p. A 466

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Innovations

• Seeing through Soot
  p. A 470

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Science Selections

• Pulp Mills Make More Males
• Reproduction Disruption
• Pediatrician Prescription
  p. A 474

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Research

Articles

• Male-Biased Sex Ratios of Fish Embryos near a Pulp Mill: Temporary Recovery after a Short-Term Shutdown
  D. G. Joakim Larsson and Lars Förlin
  p. 739

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• Dual Effects of Phytoestrogens Result in U-Shaped Dose-Response Curves
  Kristian Almstrup, Mariana F. Fernández, Jørgen H. Petersen, Nicolas Olea, Niels E. Skakkebæk, and Henrik Leffers
  p. 743

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• Rapid Increases in the Steady-State Concentration of Reactive Oxygen Species in the Lungs and Heart after Particulate Air Pollution Inhalation
  Sonia A. Gurgueira, Joy Lawrence, Brent Coull, G. G. Krishna Murthy, and Beatriz González-Flecha
  p. 749

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• Low-Dose Pharmacokinetics and Oral Bioavailability of Dichloroacetate in Naive and GST-Depleted Rats
  Shakil A. Saghir and Irvin R. Schultz
  p. 757

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• Environmental Tobacco Smoke Exposure and Pulmonary Function among Adults in NHANES III: Impact on the General Population and Adults with Current Asthma
  Mark D. Eisner
  p. 765

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• Sexual Maturation in Relation to Polychlorinated Aromatic Hydrocarbons: Sharpe and Skakkebaek's Hypothesis Revisited
  Elly Den Hond, Harry A. Roels, Karel Hoppenbrouwers, Tim Nawrot, Lutgarde Thijs, Corinne Vandermeulen, Gerhard Winneke, Dirk Vanderschueren, and Jan A. Staessen
  p. 771

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• Populations and Determinants of Airborne Fungi in Large Office Buildings
  H. Jasmine Chao, Joel Schwartz, Donald K. Milton, and Harriet A. Burge
  p. 777

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• Disease Transmission Models for Public Health Decision Making: Analysis of Epidemic and Endemic Conditions Caused by Waterborne Pathogens
  Joseph N. S. Eisenberg, M. Alan Brookhart, Glenn Rice, Mary Brown, and John M. Colford, Jr.
  p. 783

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• Detection of Xenoestrogens in Serum after Immunoprecipitation of Endogenous Steroidal Estrogens
  Kala Natarajan, James W. Overstreet, Jane M. Rogers, Michael S. Denison, Jiangang Chen, Peter N. Lohstroh, Daniel S. McConnell, and Bill L. Lasley
  p. 791

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• Evidence That Ultrafine Titanium Dioxide Induces Micronuclei and Apoptosis in Syrian Hamster Embryo Fibroblasts
  Qamar Rahman, Mohtashim Lohani, Elke Dopp, Heidemarie Pemsel, Ludwig Jonas, Dieter G. Weiss, and Dietmar Schiffmann
  p. 797

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• Increased Serum Corticosterone and Glucose in Offspring of Chromium(III)-Treated Male Mice
  Robert Y. S. Cheng, W. Gregory Alvord, Douglas Powell, Kazimierz S. Kasprzak, and Lucy M. Anderson
  p. 801

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• Evidence of Reproductive Endocrine Effects in Women with Occupational Fuel and Solvent Exposures
  Susan R. Reutman, Grace Kawas LeMasters, Edwin A. Knecht, Rakesh Shukla, James E. Lockey, G. Edward Burroughs, and James S. Kesner
  p. 805

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• Cytotoxicity of Fumonisin B₁, Diethylnitrosamine, and Catechol on the SNO Esophageal Cancer Cell Line
  Rene B. Myburg, Michael F. Dutton, and Anil A. Chuturgoon
  p. 813

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Children's Health

• A Nested Case-Control Study of Methemoglobinemia Risk Factors in Children of Transylvania, Romania
  Catherine L. Zeman, Burton Kross, and Marianna Vlad
  p. 817

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• The Environmental History in Pediatric Practice: A Study of Pediatricians' Attitudes, Beliefs, and Practices
  Nikki Kilpatrick, Howard Frumkin, Jane Trowbridge, Cam Escoffery, Robert Geller, Leslie Rubin, Gerald Teague, and Janice Nodvin
  p. 823

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• Temporal Association of Children's Pesticide Exposure and Agricultural Spraying: Report of a Longitudinal Biological Monitoring Study
  Denise Koch, Chensheng Lu, Jennifer Fisker-Andersen, Lance Jolley, and Richard A. Fenske
  p. 829

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• Temporal Trends of Organochlorine Concentrations in Umbilical Cord Blood of Newborns from the Lower North Shore of the St. Lawrence River (Québec, Canada)
  Frédéric Dallaire, Éric Dewailly, Claire Laliberté, Gina Muckle, and Pierre Ayotte
  p. 835

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Announcements

• Extramurally Speaking
  A 477
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• Fellowships, Grants & Awards
  p. A 478
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• Career Opportunities
  p. A 480
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• Calendar
  p. A 484
• New Books
  p. A 486
• Editorial Policy and Instruction to Authors