• Daly, E., Vessey, M.P., Hawkins, M.M., Carson, J.L., Gough, P. & Marsh, S. (1996) Risk of venous thromboembolism in users of hormone replacement therapy. Lancet, 348, 977980.DOI: 10.1016/s0140-6736(96)07113-9
  • Farmer, R.D., Lawrenson, R.A., Thompson, C.R., Kennedy, J.G. & Hambleton, I.R. (1997) Population-based study of risk of venous thromboembolism associated with various oral contraceptives. Lancet, 349, 8388.DOI: 10.1016/s0140-6736(96)07496-x
  • Grodstein, F., Stampfer, M.J., Goldhaber, S.Z., Manson, J.E., Colditz, G.A., Speizer, F.E., Willett, W.C. & Hennekens, C.H. (1996) Prospective study of exogenous hormones and risk of pulmonary embolism in women. Lancet, 348, 983987.DOI: 10.1016/s0140-6736(96)07308-4
  • Labropoulos, N., Giannoukas, A.D., Leon, M., Kalodiki, E., Wyatt, M., Gupta, S.D. & Nicolaides, A.N. (1996) Complications after intravenous drug abuse and the diagnostic value of color flow duplex scanning. Journal of Vascular Technology, 20, 2728.
  • Makower, R.M., Pennycook, A.G. & Moulton, C. (1992) Intravenous drug abusers attending an inner city accident and emergency department. Archives of Emergency Medicine, 9, 3239.
  • McColl, M.D., Ramsay, J.E., Tait, R.C., Walker, I.D., McCall, F., Conkie, J.A., Carty, M.J. & Greer, I.A. (1997) Risk factors for pregnancy associated venous thromboembolism. Thrombosis and Haemostasis, 78, 11831188.
  • Perez Gutthann, S., Garcia Rodriguez, L.A., Castellsague, J. & Duque Oliart, A. (1997) Hormone replacement therapy and risk of venous thromboembolism: population based case-control study. British Medical Journal, 314, 796800.
  • World Health Organization (1995a) Effect of different progestagens in low oestrogen oral contraceptives on venous thromboembolic disease. Lancet, 346, 15821588.
  • World Health Organization (1995b) Venous thromboembolic disease and combined oral contraceptives: results of international multicentre case-control study. Lancet, 346, 15751582.