The seasonality effects of Baccharis dracunculifolia in the reactive oxygen species production by stimulated neutrophils - Figueiredo, A. S. G. de; Azzolini, Ana Elisa Caleiro Seixas; Jorge, R. F.; Bastos, Jairo Kenupp; Lucisano-Valim, Yara Maria (Meeting of The SFRBM - South American Group, 2009)