Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Characterization of circadian marker rhythms. (A) Percentage of individuals in whom, under constant routine conditions, a significant amplitude could be detected for each circadian marker. The actual number of individuals is shown above each bar. (B) Mean fitted z-score amplitudes (± SD). (C) Mean fitted z-score phase maxima (± SD). **P = 0.0027, ***P = 0.0004. CORT = Cortisol, MEL = Melatonin
