Appraising the role of previously reported risk factors in epithelial ovarian cancer risk: A Mendelian randomization analysis by Yarmolinsky, James, Relton, Caroline L., Lophatananon, Artitaya, Muir, Kenneth, Menon, Usha, Gentry-Maharaj, Aleksandra, Walther, Axel, Zheng, Jie, Fasching, Peter, Zheng, Wei, Woo, Yin Ling, Park, Sue K., Kim, Byoung-Gie, Choi, Ji-Yeob, Park, Boyoung, Davey Smith, George, Martin, Richard M., Lewis, Sarah J.