The Risk of Gynecological Cancers Associated With Different HRT Formulations. A Nested Case-Control Study in the German Cohort Study on Women's Health - Gynecological Tumors and HRT Use - Dinger, J C; Heinemann, L A J; Minh Thai, Do; Möhner, S; Assmann, A; Thiel, C (Geburtshilfe und Frauenheilkunde, 2006)