1.   Koopman, K. E., Booij, J., Fliers, E., Serlie, M. J., & La Fleur, S. E. (2013). Diet-induced changes in the lean brain: hypercaloric high-fat-high-sugar snacking decreases serotonin transporters in the human hypothalamic region. Molecular metabolism2(4), 417-422. 
  2.   Avena, N. M., Rada, P., & Hoebel, B. G. (2008). Evidence for sugar addiction: behavioral and neurochemical effects of intermittent, excessive sugar intake. Neuroscience & Biobehavioral Reviews32(1), 20-39.