Richard L. Gregory, PhD, is a professor of biomedical and applied sciences, pathology, and laboratory medicine; adjunct professor of preventive and community dentistry; director of the PhD dental science program; director of student research programs, and associate dean for graduate education at Indiana University School of Dentistry (IUSD) in Indianapolis. He received the IUSD Outstanding Faculty Member of the Year award in 2003. Gregoryês research interests include the effect of tobacco on mucosal biology, efficacy of antimicrobial compounds, and the microbiome of the respiratory tract.