One thing that irritates me about many brief abstracts of scientific research is lack of citation. If one reviews a paper, one should provide the publication information. Spare the reader from having to track it down.
Cannabinoids excite circadian clock neurons. [J Neurosci. 2010] - PubMed result
Unfortunately, as a person with a three decade old pot conviction, Canada will deport me if I show up. Otherwise I'd probably have moved there a long time ago.