Circadian timekeeping and output mechanisms in animals.
Curr Opin Neurobiol. 2013 Oct;23(5):724-31. doi: 10.1016/j.conb.2013.02.018. Epub 2013 May 31.
Curr Opin Neurobiol. 2013.
PMID: 23731779
Free PMC article.
Review.