Antinociceptive effects of ethanolic extract from the flowers of Acmella oleracea (L.) R.K. Jansen in mice - Nomura, E C; Rodrigues, M R; da Silva, C F; Hamm, L A; Nascimento, A M; de Souza, L M; Cipriani, T R; Baggio, C H; Werner, M F (J Ethnopharmacol, 2013)