Chaves F, Chacón M, Badilla B, Arévalo C. Effect of Echinacea purpurea (Asteraceae) aqueous extract on antibody response to Bothrops asper venom and immune cell response. Rev. Biol. Trop. [Internet]. 2007Mar.1 [cited 2024Apr.23];55(1):113–119. Available from: https://revistas.ucr.ac.cr/index.php/rbt/article/view/6061