THE DIFFERENCE OF AVERAGE LEVEL OF SERUM N-TERMINAL proB-TYPE NATRIURETIC PEPTIDE (NT-proBNP) IN PATIENTS HYPERTENSION WITHOUT AND WITH LEFT VENTRICULAR HYPERTROPHY AT CARDIOLOGY OUTPATIENT Dr. SARDJITO GENERAL HOSPITAL - , Gusti Hariyadi Maulana ([Yogyakarta] : Universitas Gadjah Mada, 2013)