OPG and PgR show similar cohort specific effects as prognostic factors in ER positive breast cancer

Nicole Sänger, Eugen Ruckhäberle, Giampaolo Bianchini, Tomas Heinrich, Karin Milde-Langosch, Volkmar Müller, Achim Rody, Erich Franz Solomayer, Tanja Fehm, Uwe Holtrich, Sven Becker, Thomas Karn^*