| Foreword | IFSTP Satellite Meeting of the 4th European Congress of Toxicologic Pathology 2006: Definition of No-Observed-Adverse-Effect-Level (NOAEL) in Toxicology Studies | Yoichi Konishi | International Federation of Societies of Toxicologic Pathologists (IFSTP) |  |
| Feature Articles: IFSTP Satellite Meeting Reports | The No-Observed-Adverse-Effect-Level (NOAEL) in Drug Safety Evaluations | Michael A. Dorato | Toxicology and Drug Disposition, Lilly Research Laboratories, Eli Lilly and Company |  |
| Establishing the NOAEL in Reproductive Toxicity Studies for a New Medicine | David A. Beckman | Safety Profiling & Assessment Toxicology, Novartis Pharmaceuticals Corporation |  |
| Low Dose Carcinogenicity of Genotoxic Carcinogens | Shoji Fukushima a)
Hideki Wanibuchi b)
Min Wei b)
Keiichirou Morimura b)
Anna Kinoshita b) | a) Japan Bioassay Research Center, Japan Industrial Safety and Health Association
b) Department of Pathology, Osaka City University Medical School |  |
| Establishing the NOAEL in Repeat Dose Toxicity Studies for a New Medicine: Issues That May Arise | Hugh E. Black | Hugh E. Black and Associates, Inc. |  |
| The Interpretation of Liver Enlargement in Pesticide Regulatory Toxicity Studies | David J. Andrew | Human Health, Pesticides Safety Directorate |  |
| Use of NOAEL Values for Conducting Risk Assessment of Agrochemicals: Classical and New Approaches | Kim Z. Travis | Syngenta |  |
| Reviews | Are Hydroxyl Radical and Singlet Oxygen Responsible for Oxidative Damage in Biological Systems? | Yuzo Nishida | Yamagata University |  |
| International Harmonization on Legislation of Food Additives | Tadashi Hirakawa | Japan Food Additives Association |  |
| The Japanese Positive List System for Agricultural Chemical Residues in Foods and Food Additives | Shinjiro Hori | Kansai Medical University |  |