Fecal glucocorticoid metabolites and assay validation: stress response evaluation in captive brown howler monkeys (Alouatta clamitans) - Buti, Thais Eleonora Madeira; Kugelmeier, Tatiana; Sobral, Gisela; Furtado, Priscila Viau; Neves, Dafne do Valle Dutra de Andrade; Oliveira, Claudio Alvarenga de (Journal of Medical Primatology, 2018)