Also, we excluded CSNK1D and PER2 (circadian core set), whose mutations cause familial advanced sleep phase syndrome, as well as RAI1, BHLHE41, UBE3A, and HCRT (responsible for Smith-Magenis/Potocki-Lupski syndromes, short sleep phenotype, Angelman syndrome and narcolepsy, respectively), which had already been included in the mouse strain gene set. This evidence concerns the gene PER2 and advanced sleep phase syndrome.