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Coolen A, Hoffmann K, Barf RP, Fuchs E, Meerlo P.Coolen A, et al. Among authors: meerlo p.Sleep. 2012 Jun 1;35(6):879-88. doi: 10.5665/sleep.1894.Sleep. 2012.PMID: 22654207Free PMC article.
Meerlo P, Sgoifo A, Suchecki D.Meerlo P, et al.Sleep Med Rev. 2008 Jun;12(3):197-210. doi: 10.1016/j.smrv.2007.07.007. Epub 2008 Jan 25.Sleep Med Rev. 2008.PMID: 18222099Review.