Ovarian cancer and oral contraceptives: collaborative reanalysis of data from 45 epidemiological studies including 23 257 women with ovarian cancer and 87 303 controls
Beral, V.; Doll, R.; Hermon, C.; Peto, R.; Reeves, G.; Brinton, L.; Green, A. C.; Marchbanks, P.; Negri, E.; Ness, R.; Peeters, P.; Vessey, M.; Calle, E. E.; Rodriguez, C.; Dal Maso, L.; Talamini, R.; Cramer, D.; Hankinson, S. E.; Tworoger, S. S.; Chetrit, A.; Hirsh-Yechezke (2008)