Comparison of two methods for glucocorticoid evaluation in maned wolves - Vasconcellos, Angélica da Silva; Chelini, Marie-Odile Monier; Palme, Rupert; Guimaraes, Marcelo Alcindo de Barros Vaz; Oliveira, Cláudio Alvarenga de; Ades, César (Pesquisa Veterinária Brasileira, 2011)