title: Comment on: 'Second to fourth digit ratio (2D:4D), breast cancer risk factors, and breast cancer risk: a prospective cohort study'.
authors.forename: L
authors.initials: L
authors.lastname: Costas
authors.forename: M
authors.initials: M
authors.lastname: Kogevinas
authors.forename: S
authors.initials: S
authors.lastname: de Sanjosé
mesh_terms: D001943:Breast Neoplasms / Q000453:epidemiology*; D005260:Female; D005385:Fingers / Q000033:anatomy & histology*; D006801:Humans