Schapiro, S. J., Laule, G., Seelig, D. 2007. "Applied behavior" panel discussion. Journal of Applied Animal Welfare Science 10(1), 79-81.

Adriane and Kris just trained eight rhesus monkeys to present their arms in the blood sleeve for blood samples, and it took, on average ... 8 months ... 160 minutes spread out into 40 sessions.