Lanza di Scalea T, Matthews KA, Avis NE, Thurston RC, Brown C, Harlow S, Bromberger JT. Role stress, role reward, and mental health in a multiethnic sample of midlife women: results from the Study of Women's Health Across the Nation (SWAN). J Womens Health (Larchmt). 2012 May; 21(5):481-9.