Comparison of midazolam and butorphanol combined with ketamine or dexmedetomidine for chemical restraint in howler monkeys (Alouatta guariba clamitans) for vasectomy
1. Veterinary School, UFMG, Belo Horizonte, Brazil;2. Faculty of Veterinary Medicine, UFRGS, Porto Alegre, Brazil;3. Autonomous Veterinary, Porto Alegre, Brazil