Dr. Greenspan, PhD, University of Maryland, School of Medicine, was a leader in the field of translational pain research, focusing on the orofacial region, and widely regarded as a pioneer in exploring sex and gender differences in pain and analgesia. He served as a center principal investigator of a 14-year, multi-center, prospective study of predictive biomarkers for temporomandibular disorder pain funded by the National Institutes of Health. He also co-organized a national workshop that culminated in a highly cited consensus report on the state of the science and which served as a guide for future research in this field.