Menstrual cyclic variation of endothelium-dependent vasodilation of the brachial artery: Possible role of estrogen and nitric oxide - Kawano, H; Motoyama, T; Kugiyama, K; Hirashima, O; Ohgushi, M; Yoshimura, M; Ogawa, H; Okumura, K; Yasue, H (Proc Assoc Am Physicians, 1996)