Schapiro, S. J., Perlman, J. E., Thiele, E. et al. 2005. Training chimpanzees to voluntarily present for intramuscular injections using positive reinforcement training techniques. American Journal of Primatology 66(Supplement), 175 (Abstract).
82 animals were reliably trained to present for injection in a mean of 87 minutes. During 2003, 68% of 361 injections were given to animals voluntarily presenting a thigh.
Year
2005