Assessment of mexican arnica (Heterotheca inuloides Cass) and rosemary (Rosmarinus officinalis) extracts on dopamine and selected biomarkers of oxidative stress in stomach and brain of Salmonella typhimurium infected rats Guzmàn DCalderón, Herrera MOrtiz, Brizuela NOsnaya, Mejía GBarragàn, García EHernàndez, Olguín HJuàrez, et al.. Assessment of mexican arnica (Heterotheca inuloides Cass) and rosemary (Rosmarinus officinalis) extracts on dopamine and selected biomarkers of oxidative stress in stomach and brain of Salmonella typhimurium infected rats. Pharmacognosy Magazine . 2017;13(50):203-208.