Oestrogen plus progestogen increased risk of breast cancer in postmenopausal womenInfluence of estrogen plus progestin on breast cancer and mammography in healthy postmenopausal women: the Womens Health Initiative Randomized Trial.

Chlebowski RT, Hendrix SL, Langer RD, et al.Influence of estrogen plus progestin on breast cancer and mammography in healthy postmenopausal women: the Women’s Health Initiative Randomized Trial.JAMA 2003;289:3243–53.ChlebowskiRTHendrixSLLangerRDet alInfluence of estrogen plus progestin on breast cancer and mammography in healthy postmenopausal women: the Womens Health Initiative Randomized Trial.JAMA20032893243-53

Sources of funding: National Heart, Lung and Blood Institute and Wyeth-Ayerst Research Laboratories.

For correspondence: Dr R T Chlebowski, Harbor-UCLA Research and Education Institute, Torrance, CA, USA.[email protected]

Abstract and commentary also appear in ACP Journal Club.