title: Re: Variation in mammographic breast density by time in menstrual cycle among women aged 40-49 years.
authors.forename: J S
authors.initials: JS
authors.lastname: Spratt
mesh_terms: D000328:Adult; D001940:Breast / Q000033:anatomy & histology / Q000528:radiation effects*; D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000517:prevention & control; D004847:Epithelial Cells / Q000528:radiation effects; D005260:Female; D016195:G2 Phase; D006801:Humans; D008327:Mammography; D008597:Menstrual Cycle; D008875:Middle Aged; D009381:Neoplasms, Radiation-Induced / Q000517:prevention & control