Association of the Period3 clock gene length polymorphism with salivary cortisol secretion among police officers.
OBJECTIVE: This study evaluated whether measures of waking or diurnal cortisol secretion, or self-reported psychological disturbances differed among police officers with a Period3 (PER3) clock gene length polymorphism.
METHODS: The cortisol awakening response was characterized via the area under the salivary cort.....