- An in vitro interethnic comparison of monoamine oxidase activities between Japanese and Caucasian livers using rizatriptan, a serotonin receptor 1B/1D agonist, as a model drug. Iwasa, T., Sano, H., Sugiura, A., Uchiyama, N., Hara, K., Okochi, H., Nakagawa, K., Yasumori, T., Ishizaki, T. British journal of clinical pharmacology. (2003)