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Vaccination against GnRH may suppress aggressive behaviour and musth in African elephant (#Loxodonta africana") bulls - a pilot study. De Nys Hélène, Bertschinger H.J., Turkstra J.A., Colenbrander B., Palme R., Human A.M.. 2010. Journal of the South African Veterinary Association, 81 (1) : 8-15.