Paredes, Sergio D Altered circadian rhythms of corticosterone, melatonin, and phagocytic activity in response to stress in rats. [electronic resource] - Neuro endocrinology letters Aug 2007 - 489-95 p. digital Publication Type: Journal Article ISSN: 0172-780X Subjects--Topical Terms: AnimalsCell CountCircadian Rhythm--physiologyCorticosterone--bloodImmune System--physiologyMacrophages--pathologyMaleMelatonin--bloodMicrospheresPeritoneal Cavity--cytologyPhagocytosis--physiologyPhysical Conditioning, Animal--physiologyRatsRats, WistarStress, Physiological--pathologySwimming--physiology