Department of Urology and Andrology,Shanghai Institute of Andrology,Renji Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai 200001,China;
Department of Urology,Yantai Affiliated Hospital of Binzhou Medical University,Yantai 264100,China;
erectile dysfunction; nerve-sparing radical prostatectomy; penile length; tadalafil; vacuum erectile devices;