Zilpaterol hydrochloride improves feed efficiency and changes body composition in nonimplanted Nellore heifers - Cônsolo, Nara Regina Brandão; Rodriguez, Frederich Diaz; Goulart, Rodrigo Silva; Frasseto, Matheus Orlandin; Ferrari, Viviane Borba; Silva, Luis Felipe Prada e (Journal of Animal Science, 2015)