158 Penile Rehabilitation in the Long Term Follow-up – How Important is the Preservation of Nocturnal Penile Tumescense with Daily Low-dose Sildenafil 6 Weeks after Nerve-sparing Radical Prostatectomy?. (1st April 2019) - Bannowsky, A.; Osmonov, D.; Jünemann, K.; Ückert, S.