Echinacea species and alkamides inhibit prostaglandin E-2 production in RAW264.7 mouse macrophage cells - Lalone, C A; Hammer, K DP; Wu, L; Bae, J; Leyva, N; Liu, Y; Solco, K S; Kraus, G A; Murphy, P A; Wurtele, E S; Kim, O K; Seo, K I; Widrlechner, M P; Birt, D F (J Agric Food Chem, 2007)