Influence of race/ethnicity, body mass index, and proximity of menopause on menstrual cycle patterns in the menopausal transition: the Study of Women's Health Across the Nation.
Paramsothy P, Harlow SD, Elliott MR, Yosef M, Lisabeth LD, Greendale GA, Gold EB, Crawford SL, Randolph JF. Influence of race/ethnicity, body mass index, and proximity of menopause on menstrual cycle patterns in the menopausal transition: the Study of Women's Health Across the Nation. Menopause. 2015 Feb; 22(2):159-65.