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Number of PER2-ir cells in the SCN, BNST-OV, CEA, BLA, and DG at ZT1 and ZT13 in groups of intact females on proestrus (Pro) and metestrus (Met) and in OVX females killed on the day of estrogen injection (E0) or 24 (E24), 48 (E48), or 72 (E72) h after estradiol injection or treatment with oil (Oil). n = 4 per point.
