Sleep difficulty in women at midlife: a community survey of sleep and the menopausal transition.
Kravitz HM, Ganz PA, Bromberger J, Powell LH, Sutton-Tyrrell K, Meyer PM. Sleep difficulty in women at midlife: a community survey of sleep and the menopausal transition. Menopause. 2003 Jan-Feb; 10(1):19-28.