Adenosine A2A receptor contributes to the anti-inflammatory effect of the fixed herbal combination STW 5 (Iberogast®) in rat small intestinal preparations - Michael, S; Abdel-Aziz, H; Weiser, D; Müller, C E; Kelber, O; Nieber, K (Naunyn Schmiedebergs Arch Pharmacol, 2012)