Breast Cancer / Japan / Humans / African American / Female / Body Mass Index / Aged / Middle Aged / Asian Americans / Estrogens / Body Mass / Ethnic Group / Ethnic Difference / Cohort Studies / Body Mass Index / Aged / Middle Aged / Asian Americans / Estrogens / Body Mass / Ethnic Group / Ethnic Difference / Cohort Studies
Contraception / Adolescent / Humans / Smoking / Female / Clinical Sciences / Estrogens / Adult / Public health systems and services research / Progestins / Clinical Sciences / Estrogens / Adult / Public health systems and services research / Progestins