Kalbitzer, J., Kalbitzer, U., Knudsen, G. M., Cumming, P., & Heinz, A. (2013).
How the cerebral serotonin homeostasis predicts environmental changes: a model to explain seasonal changes of brain 5-HTT
as intermediate phenotype of the 5-HTTLPR. Psychopharmacology, 230(3),
333-343. doi:10.1007/s00213-013-3308-1.