Natural product agonists of peroxisome proliferator-activated receptor gamma (PPARγ): a review - Wang, L; Waltenberger, B; Pferschy, W; Eva, M; Blunder, M; Liu, X; Malainer, C; Blazevic, T; Schwaiger, S; Rollinger, J M; Heiss, E H; Schuster, D; Kopp, B; Bauer, R; Stuppner, H; Dirsch, V M; Atanasov, A G (Biochem Pharmacol, 2014)