Perbandingan Efektivitas Metode Dekontaminasi N-acetyl-L-cysteine-sodium hydroxide(NALC-NaOH) dan Modified Petroff terhadap Kultur Mycobacterium tuberculosis = Comparison of Effectivity between N-acetyl-L-cysteine-sodium hydroxide (NALC-NaOH) and Modified Petroff Decontamination Method in Mycobacterium tuberculosis Culture