Distribution and correlates of plasma fibrinogen in middle-aged women. Initial findings of the Postmenopausal Estrogen/Progestin Interventions (PEPI) Study - Stefanick, ML; Legault, C; Tracy, RP; Howard, G; Kessler, CM; Lucas, DL; Bush, TL (Arterioscler Thromb Vasc Biol, 1995)