title: Authors' reply.
authors: University of Haifa, Mount Carmel , Haifa 31905 , Israel.
authors: Hagit
authors: H
authors: Schwimmer
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D019175:DNA Methylation; D005260:Female; D008027:Light; D008325:Mammary Neoplasms, Experimental / Q000473:pathology*; D008550:Melatonin / Q000096:biosynthesis*; D017440:Photoperiod
chemical_list: D008550:Melatonin