In vitro characterization of buprenorphine, samidorphan, and combinations being developed as an adjunctive treatment for major depressive disorder. - Pin, S.; Bidlack, J.; Knapp, B.; Deaver, D.; Plotnikava, M.; Arnelle, D.; Quinn, A.; Toh, M.; Namchuk, M. (European Neuropsychopharmacology, 2019)