Fasting biases brain reward systems towards high-calorie foods. - Goldstone, Anthony P.; Prechtl de Hernandez, Christina G.; Beaver, John D.; Muhammed, Kinan; Croese, Charlotte; Bell, Gabriel; Durighel, Giuliana; Hughes, Emer; Waldman, Adam D.; Frost, Gary; Bell, Jimmy D. (European Journal of Neuroscience, 2009)