Journal of Biological Rhythmsis the official journal of the Society for Research on Biological Rhythms and offers peer-reviewed original research in all aspects of biological rhythms, using genetic, biochemical, physiological, behavioral, epidemiological & modeling approaches, as well as clinical trials. Emphasis is on circadian and seasonal rhythms, but timely reviews and research on other periodicities are also considered. The journal is a member of theCommittee on Publication Ethics (COPE).