FrontMatter -- Preface -- Contents -- Summary -- Introduction -- Workshop Summary -- References -- Attachments -- ATTACHMENT 1: Experimental Objectives of DNA Microarray Studies by Kevin K. Dobbin -- ATTACHMENT 2: Comparison of Microarray Data from Multiple Labs and Platforms by Rafael Irizarry -- ATTACHMENT 3 -- Statistical Analysis of Toxicogenomic Microarray Data by Wherly Hoffman and Hui-Rong Qian -- ATTACHMENT 4: Diagnostic Classifier-Gaining Confidence Through Validation by Weida Tong -- Appendixes -- APPENDIX A: Workshop Planning Committee Biographical Information -- APPENDIX B: Workshop Agenda -- APPENDIX C: Federal Liaison Group for the NRC Committee on Emerging Issues and Data on Environmental Contaminants.