Debasis Bagchi, PhD, is a Professor in the Department of Pharmacological and Pharmaceutical Sciences at University of Houston, Texas. His research interests include free radicals, human diseases, carcinogenesis, pathophysiology, mechanistic aspects of cytoprotection by antioxidants, regulatory pathways in obesity, and gene expression. Siba P. Raychaudhuri, MD, is the Chief of the Rheumatology Division at the VA Medical Center in Sacramento, California, and a Clinical Assistant Professor in the Division of Rheumatology, Allergy and Clinical Immunology at the University of California, Davis. Dr. Raychaudhuri's major research focus is to understand the molecular mechanisms of immune-mediated inflammatory diseases.