PEACE V - Salvage Treatment of OligoRecurrent nodal prostate cancer Metastases (STORM): a study protocol for a randomized controlled phase II trial. - De Bruycker, A.; Spiessens, A.; Dirix, P.; Koutsouvelis, N.; Semac, I.; Liefhooghe, N.; Gomez-Iturriaga, A.; Everaerts, W.; Otte, F.; Papachristofilou, A.; Scorsetti, M.; Shelan, M.; et al. (BMC Cancer, 2020)