Efficacy of propolis on the denture stomatitis treatment in older adults: a multicentric randomized trial - Pina, Gisela de M. S.; Lia, Erica N.; Berretta, Andresa A.; Nascimento, Andresa P.; Torres, Elina C.; Buszinski, Andrei F. M.; Campos, Tatiana A. de; Coelho, Eduardo Barbosa; Martins, Vicente de P. (Evidence-Based Complementary and Alternative Medicine, 2017)