Petasites hybridus extracts inhibit COX-2 and PGE2 release by direct interaction with the enzyme and by preventing p42/44 MAP kinase activation in rat primary microglial cells - Fiebich, BL; Grozdeval, M; Hess, S; Hüll, M; Danesch, U; Bodensieck, A; Bauer, R (Planta Med, 2004)
accepted for publication.