Kluge, M., Schüssler, P., Bleninger, P., Kleyer, S., Uhr, M., Weikel, J. C., et al. (2008). Ghrelin alone or co-administered with GHRH or CRH increases non-REM sleep and decreases REM sleep in young males. Psychoneuroendocrinology, 33(4), 497-506.