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Collaborative Group On Epidemiological Studies Of Ovarian Cancer; Beral V, Gaitskell K, Hermon C, Moser K, Reeves G, Peto R.Collaborative Group On Epidemiological Studies Of Ovarian Cancer, et al.Lancet. 2015 May 9;385(9980):1835-42. doi: 10.1016/S0140-6736(14)61687-1. Epub 2015 Feb 13.Lancet. 2015.PMID: 25684585Free PMC article.