Antioxidant effect of standardized extract of propolis (EPP-AF®) in healthy volunteers: A “before and after” clinical study - Diniz, Débora Piai; Lorencini, Daniela Aparecida; Berretta, Andresa Aparecida; Cintra, Monica A. C. T.; Lia, Erica N.; Jordão Junior, Alceu Afonso; Coelho, Eduardo Barbosa (Evidence-Based Complementary and Alternative Medicine, 2020)