1. Endocrine activities of ghrelin, a natural growth hormone secretagogue (GHS), in humans: comparison and interactions with hexarelin, a nonnatural peptidyl GHS, and GH-releasing hormone;Arvat;J. Clin. Endocrinol. Metab.,2001
2. Endogenous ghrelin is an orexigenic peptide acting in the arcuate nucleus in response to fasting;Bagnasco;Regul. Pept.,2003
3. An ether stressor increases REM sleep in rats: possible role of prolactin;Bodosi;Am. J. Physiol.: Regul., Integr. Comp. Physiol.,2000
4. Rhythms of ghrelin, leptin, and sleep in rats: effects of the normal diurnal cycle, restricted feeding, and sleep deprivation;Bodosi;Am. J. Physiol.: Regul., Integr. Comp. Physiol.,2004
5. A two process model of sleep regulation;Borbely;Hum. Neurobiol.,1982