1 Department of Urology, University Hospital Essen, Essen, Germany.
2 Department of Nuclear Medicine, DKTK and NCT University Hospital Essen, 45147, Essen, Germany; State Cancer Registry North-Rhine Westphalia, Bochum, Germany.
3 State Cancer Registry North-Rhine Westphalia, Bochum, Germany.
4 Department of Nuclear Medicine, DKTK and NCT University Hospital Essen, 45147, Essen, Germany. Electronic address: wolfgang.fendler@uk-essen.de.