An overview of mushroom cultivation and utilization as functional foods -- Molecular analysis & genomic studies of the shiitake mushroom Lentinula edodes -- Nutritional value and health benefits of mushrooms -- Sclerotia : an emerging functional food derived from mushrooms -- Antitumor and immunomodulatory activities of mushroom polysaccharides -- Regulatory issues of mushrooms as functional foods and dietary supplements : safety and efficacy