In vitro antioxidant, anticholinesterase and antimicrobial activity studies on three Agaricus species with fatty acid compositions and iron contents: a comparative study on the three most edible mushrooms - Öztürk, M; Duru, M E; Kivrak, S; Mercan-Doğan, N; Türkoglu, A; Özler, M A (Food Chem Toxicol, 2011)