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2. Oral contraceptives and cardiovascular disease;Stadel, B.V.;N EnglJ7 Med,1981
3. Female hormones and vascular disease: epidemiologic overview;Vessey, M.P.;British Journal of Family Planning,1980
4. Oral contraceptives and thromboembolic disease: Swedish experience;Bottiger, L.E.; Westerholm, B.;Acta Med Scand,1979
5. Oral contraceptives, anti-thrombin III activity, and post-operative deep-vein thrombosis;Sagar, S.; Stamatakis, J.D.; Thomas, D.P.; Kakkar, VV;Lancet,1976