Expression of Prostate-Specific Membrane Antigen (PSMA) on Biopsies Is an Independent Risk Stratifier of Prostate Cancer Patients at Time of Initial Diagnosis oleh Marie Christine Hupe, Christian Philippi, Doris Roth, Christiane Kümpers, Julika Ribbat-Idel, Finn Becker, Vincent Joerg, Stefan Duensing, Verena Helena Lubczyk, Jutta Kirfel, Verena Sailer, Rainer Kuefer, Axel Stuart Merseburger, Sven Perner, Anne Offermann