Penerapan preoperative teaching pada klien dengan masalah Bedah Benign Prostatic Hyperplasia- Transurethral Resection of the Prostate (BPH-TURP) di Ruang Anggrek Tengah Kanan (Bedah Kelas) RSUP Persahabatan = The analysis of application preoperative teaching in Benign Prostatic Hyperplasia-Transurethral Resection of the Prostate (BPH-TURP) Client at Ward of Anggrek Tengah Kanan (Bedah Kelas) RSUP Persahabatan