In memoriam. Ronald Dubner: 1934 to 2023.

aDepartment of Anesthesia, McGill University, Montreal, QC, Canada bDepartment of Neural and Pain Sciences, University of Maryland Dental School, Baltimore, MD, United States cFaculty of Dentistry, Department of Physiology Faculty of Medicine, and Centre for the Study of Pain, University of Toronto, Toronto, ON, Canada *Corresponding author. Address: Faculty of Dentistry, University of Toronto, 124 Edward St, Toronto, ON M5G 1G6, Canada. Tel.: 416-9463742. E-mail address: [email protected] (B. J. Sessle). The authors have no conflicts of interest to declare.