Oral contraceptive use and fibrocystic breast disease among pre- and postmenopausal women. - Berkowitz,G.S.; Kelsey,J.L.; LiVolsi,V.A.; Holford,T.R.; Merino,M.J.; Ort,S.; O'Connor,T.Z.; Goldenberg,I.S.; White,C. (Am J Epidemiol, 1984)